Best year model sv345 to choose for a build

[Winchester000]

Hey guys I am putting together a 1978 scout for me first and to pass down to my grandson it has a 345E in it but has been dusted, I have 3 good 345 donor engines, 1969 dark blue reman, 1984 school bus, and a 1979 scout factory 4 barrel, which one is the better choice all around, thanks?

 

[FDChappie]

Heads without the air injection ports should flow better. Depending how complete the rebuild, the rest should be pretty much the same. What your goals for the build? Also your selection should all be flat top pistons. Some of the older 345's had popup pistons and different combustion chambers.