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Old 06-23-2019, 11:41 AM   #16
Scoutboy74
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Default Re: Change 1977 345 to Prestolite points distributor?

Top terminal is S for start, bottom terminal is R for resistor. Other end can either go all the way to coil POS or just to the coil side of the ballast, whichever you prefer.
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Coal Trickle - '99 Dodge Ram SLT 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500/8800# GVW/12K# winch
Hooty - '74 SII 4x4 - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/33g Fuel
Lemuel - '73 1210 Reg Cab 4x4 CS - 304/TF727/NP205/4.09 FA25 & 4.10 RA16/6800# GVW - "Pull Lemuel, pull!"
Organ Donor - '72 1210 Reg Cab 2WD - seized 392/TF727/7500# GVW - "Use my body to keep you alive!"
Mongo - '71 1210 Reg Cab 2WD - 345/TF727/4.10 RA17/6100# GVW - "Mongo love candy! Duh, huh, huh!"
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Old 06-25-2019, 01:22 PM   #17
mbiver
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Default Re: Change 1977 345 to Prestolite points distributor?

Had to pull the passenger exhaust manifold anyway due to rot, so got a picture. Is that the R terminal circled? Thanks. Just want to be sure so I dont burn this thing to the ground! 😀
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1978 Scout II with 1977 345 engine
Four wheel drive Dana 44 Axle's, Dana 20 T-Case, Power Steering, Power Brakes (Disc/Drum), no A/C.
Manual trans, Borg Warner 3-speed w/floor shift.
Prestolite distributor with petronix.
Fuel System: New 19Gal. Poly tank/Sending unit and Holley 2300 P/N 07448 kit from IHPartsAmerica, Nylon fuel line, relined original fuel neck filler tube.
Unknown non-oem modifications
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Old 06-25-2019, 03:07 PM   #18
Scoutboy74
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Default Re: Change 1977 345 to Prestolite points distributor?

That's it. No fear of fire by hooking to the wrong one. You just wouldn't get the benefit. I'd give all those terminals some love. They look pretty crusty. Do it with your battery unhooked though.
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Coal Trickle - '99 Dodge Ram SLT 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500/8800# GVW/12K# winch
Hooty - '74 SII 4x4 - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/33g Fuel
Lemuel - '73 1210 Reg Cab 4x4 CS - 304/TF727/NP205/4.09 FA25 & 4.10 RA16/6800# GVW - "Pull Lemuel, pull!"
Organ Donor - '72 1210 Reg Cab 2WD - seized 392/TF727/7500# GVW - "Use my body to keep you alive!"
Mongo - '71 1210 Reg Cab 2WD - 345/TF727/4.10 RA17/6100# GVW - "Mongo love candy! Duh, huh, huh!"
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Old 06-27-2019, 12:54 PM   #19
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Default Re: Change 1977 345 to Prestolite points distributor?

I installed the "new" Holley points distributor per Mr. Maybens instructions and am seeing some strange behavior. I reinstalled the Prestolite w/Ptron that was in there and am seeing the same thing there as well. If I follow the timing guidance on the valve cover that says TDC at 650-700 rpms (timed off of #8), it runs terrible and doesn't have any power just pulling away from a stop sign. If I set it to 26 degrees before TDC, it runs way better. Not perfect, but doesn't have a problem pulling away from stop signs. This engine is not the original and was installed at a used car dealership many years ago after the 304 blew. I'm wondering if they didn't set it up right (is it possible the harmonic balancer is in the wrong place), or if I'm doing something wrong? (my guess) Any thoughts appreciated, thanks.
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1978 Scout II with 1977 345 engine
Four wheel drive Dana 44 Axle's, Dana 20 T-Case, Power Steering, Power Brakes (Disc/Drum), no A/C.
Manual trans, Borg Warner 3-speed w/floor shift.
Prestolite distributor with petronix.
Fuel System: New 19Gal. Poly tank/Sending unit and Holley 2300 P/N 07448 kit from IHPartsAmerica, Nylon fuel line, relined original fuel neck filler tube.
Unknown non-oem modifications
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Old 06-27-2019, 05:08 PM   #20
Scoutboy74
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Default Re: Change 1977 345 to Prestolite points distributor?

Something's not right. Zero TDC is a recommended starting point that is generally good enough to drive on, however many of these engines do benefit from some timing advance. Usually no more than 10-12 degrees. 26 is way too much.
I gathered from earlier posts in this thread, that your Scout was a satisfactory runner/driver before you embarked on this latest distributor swaperoo. Is that correct?
Are you absolutely certain that you had the #8 piston at TDC on the COMPRESSION stroke when you did your distributor stab? This is vital. #8 piston will be at the top on the exhaust stroke too.
Are you certain you got all of your plug wires routed correctly, in clockwise fashion and according to the engine firing order beginning with #8 and ending with #1?
You might just have all of your plug wires one spot off from where they should be. I'm thinking maybe if you relocated them all one spot counter-clockwise from where they are now, you could then rotate the distributor clockwise to retard.
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Coal Trickle - '99 Dodge Ram SLT 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500/8800# GVW/12K# winch
Hooty - '74 SII 4x4 - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/33g Fuel
Lemuel - '73 1210 Reg Cab 4x4 CS - 304/TF727/NP205/4.09 FA25 & 4.10 RA16/6800# GVW - "Pull Lemuel, pull!"
Organ Donor - '72 1210 Reg Cab 2WD - seized 392/TF727/7500# GVW - "Use my body to keep you alive!"
Mongo - '71 1210 Reg Cab 2WD - 345/TF727/4.10 RA17/6100# GVW - "Mongo love candy! Duh, huh, huh!"
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Old 06-27-2019, 06:59 PM   #21
Winchested
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Default Re: Change 1977 345 to Prestolite points distributor?

Or he isn't plugging the vac advance to set his base timing.
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Old 06-28-2019, 10:32 AM   #22
mbiver
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Default Re: Change 1977 345 to Prestolite points distributor?

Well, was doing some more reading and may have stumbled across the problem....ME! I was NOT verifying that it was the compression stroke....just that there was pressure pushing back against my finger in the number 8 spark plug hole. So I could have been at the top after the power stroke, instead of where I should be...at the top of the compression stroke. Hope I haven't done any damage. I've got the exhaust manifolds off now soaking in some rust remover and will re-stab the distributor once I've got those painted up and back on....this time on the compression stroke.
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1978 Scout II with 1977 345 engine
Four wheel drive Dana 44 Axle's, Dana 20 T-Case, Power Steering, Power Brakes (Disc/Drum), no A/C.
Manual trans, Borg Warner 3-speed w/floor shift.
Prestolite distributor with petronix.
Fuel System: New 19Gal. Poly tank/Sending unit and Holley 2300 P/N 07448 kit from IHPartsAmerica, Nylon fuel line, relined original fuel neck filler tube.
Unknown non-oem modifications
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Old 06-28-2019, 10:44 AM   #23
Scoutboy74
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Default Re: Change 1977 345 to Prestolite points distributor?

That's how you know you're on the comp stroke is by the air forced out of the vacant plug hole. If the piston was then at the top of the stroke as correlated by a piece of dowel rod or screwdriver to indicate peak upward travel, in combination with seeing the timing scribe very near 0 on the index, then that piston is at TDC on the comp stroke. From there it comes down to how far the distributor gear may have rotated as the distributor was inserted, and how closely aligned the rotor was under one of the holes on the distributor cap. That would be where the #8 plug wires goes.
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Coal Trickle - '99 Dodge Ram SLT 2500 Q-Cab SWB 4x4 - 5.9L 24V CTD/NV4500/8800# GVW/12K# winch
Hooty - '74 SII 4x4 - 392/TF727/D20/3.73 D44's/Spartan FA/Krac-lok RA/33g Fuel
Lemuel - '73 1210 Reg Cab 4x4 CS - 304/TF727/NP205/4.09 FA25 & 4.10 RA16/6800# GVW - "Pull Lemuel, pull!"
Organ Donor - '72 1210 Reg Cab 2WD - seized 392/TF727/7500# GVW - "Use my body to keep you alive!"
Mongo - '71 1210 Reg Cab 2WD - 345/TF727/4.10 RA17/6100# GVW - "Mongo love candy! Duh, huh, huh!"
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