R-100 4X4

[FDChappie]

Those are big'uns.

 

[Jesse Stewart]

 

[Jesse Stewart]

I'm starting to like how the dash is turning out ...

At first I was like "IDK" ...

 

[FDChappie]

Very nice job with that dash. Looks vintage and modern all at the same time. That's a tough one to make happen.

 

[Jesse Stewart]

Thanks .. It's growing on me ..

Changing game plan with the Big Block motor ...
Had the need for some tools .. Wanted to finish building the 781 heads, but the tooling I have wasn't going to do the job ...

As always needed some bucks to buy what was needed ..

Being the 4-bolt main block was going to be a long time build, I sold it ..
The 2-bolt motor will go in the truck for the time being, I'll find another 4-bolt Mark IV down the road .. And start all over with building a 496" ..

Head tools are on order ..

The Fellow who bought the 4-bolt block wants me to finish building it ..
Looking like it's going to be a stroker 496" afterall .. Got a rotating assembly on order ..
Going in a 1960 Chevy pickup .. Teramax 5 speed tranny .. Should be a fun truck to drive (If ya can keep rear tires on the critter?)

 

[Jesse Stewart]

Some chewing got done .. More meat to be chewed out ..

 

[FDChappie]

I think we have the same mill. I didn't know that type of work could be done with it.

 

[Jesse Stewart]

 

[FDChappie]

Ah, I see you have the ability to rotate the head. Mine is just a general mill.

 

[Jesse Stewart]

It's a dedicated machine for doing head work on valve seats and guides ..
The way I have it tooled makes for slow work, but I'm not in any hurry ..

End results are the same as using a Sunnen VGS-20 only takes longer to get done ...
(Being 'Old & Slow' myself, it fits right in)

Made a lot of tools for having the ability to work Harley heads ..
The Pan's, Shovel's Sportster's and Evo's bolt to a plate that is clamped to the machine table..
For Knuckleheads had to build it's own fixture in order to clamp them into the machine ...

 

[Jesse Stewart]

Open chamber 118 cc ... Since this motor is getting new pistons, going to get some with a dome in order to get close to 9.5 to 1 compression ..

 

[Jesse Stewart]

Almost ready to start honing ..

.005" needs to come out to be at the finish size .. (4.310")

 

[Jesse Stewart]

Monster O.S. valves are installing really well ..

 

[Jesse Stewart]

496" Stroker outta burn some rubber or break some real expensive driveline components .. Eek !

 

[Jesse Stewart]

Two more Big Blocks to do something with ... ?

Gen VII 496 ci on the left and a Gen VI 454 ci on the right ..

Might build another truck and stick one of these in it .. ??

The Pepto-Bismol Pink has got to go .. !!

Since the dang thing would fly with a Rat motor in it, paint it to look like a Airplane ...

 

[Jesse Stewart]

Dang 496" motor is going to look good when done ...

 

[FDChappie]

Just don't make it to nice to drive.

 

[Jesse Stewart]

All the parts for the Mark IV 496" have been chosen by the owner ...
I've made suggestions along the way, but he has the final word on what to get and do ...

This one got ......

Real fast ...

 

[Jesse Stewart]

Just changed out the stones to the 280 grit ... Won't take long to hone out the .001" and be at finish size ..
Then move the torque plate to the other bank and do it all over again ...

Alrighty then ...
Wanted to check with the piston manufacturer (Wiseco) for their recommendation on the wall finish ..
They said to hone with the 280 grit to .0005" of finish size, then use 400 grit stones for taking out the .0005" ... Got them on order ...

And ....

Been in the mode of installing the oversize valves in my 781 heads ...
Had to buy more tooling to open up the bowls and cut in the intake seat ..

Real close to where the seats needs to be at ...
Some burr action will go down soon and a bit of chamber work ..

The seats are pretty much where they'll be at ....
Took a little meat off the chamber wall to allow for better flow around the O.S. exhaust valve ..
Intakes will see the same work, doing these mods will be adding a few cc's to the chamber's volume ..

Some bowl blending also was done ...

Not sure if I mentioned the guides being made for 11/32" stems instead of 3/8" which was factory stock for Big Block Chevys ..
Benefits = Less weight, and a slight increase in flow numbers ...

Cylinder notching is also on the table to do ..

 

[Jesse Stewart]

Found a 4 bolt main Mark IV block to replace the one I sold ..
Going after it this evening ...
Photos of it looks really good, soon to see it up close ..
It's also the last year for the Mark IV's .. 1990

Will be doing another 496 cid stroker with it ..
Been on the hunt for a 4 bolt for a long while, thinking I got super lucky finding this one so close to home ..

Still hadn't got around to taking the Gen VI (L-29) and Gen VII (L-18) apart yet ...

Don't have a need for them, although I might have a need for the Gen VI heads to use on a Mark IV block ??

Spec's on the L-29 Vortec BB head vs a peanut port BB head (PPH) ..

L-29 intake ports = 233.2(S) and 239.5cc (L).
PPH intake ports = 192.4(S) and 198.0cc (L).

L-29 exhaust port = 81.2cc.
PPH exhaust port = 101.3cc.

Chamber volumes. L-29 = 100 cc and PPH = 118. cc.

Approx. CR's on a regular stock, small domed 502, PPH = 8.74CR. and L-29 = 9.74CR.

For a flat-top piston 502, the L-29 would make 9.3CR.
For a stock 454 flat-top P/U truck motor PPH = 7.9CR. and L-29 = 9.0CR!!

Valves = the same for both heads at 2.065"/1.72".

NOTE: Use Fel-Pro headgasket 1017-1 to use L-29 heads on the early IV BB blocks AND check coolant holes CAREFULLY!!!

A VERY GOOD WAY TO UP YOUR OLD P/U MOTOR's POWER, imho !!

Going to put the 88 motorhome 2 bolt 454" motor up for sale ..
Will be a long block with having Gen VI heads ..
Want $2,500 .... Any takers ?