1972 F-100 7.3 IDI Build

[Kllrbkbldr]

Yep that’s really not accurate info, I’ve put 35 psi through my daily drive plus nitrous and it’s a stock engine with just studs and 6.9 head gaskets.

Why 6.9 head gaskets?

 

[Thewespaul]

Look up the 7.3 cooling mod, theres more coolant flow with the 6.9 headgaskets.

 

[IDIBRONCO]

theres more coolant flow with the 6.9 headgaskets.

I also feel that the 7.3 head gaskets aren't able to hold up if you put coolant holes in them. They don't have the rubber covered metal insert tabs like the 6.9 ones do.