does anyone know if the GMPP fast burn heads 12367712 will work on an lt1 and if so what intake and other misc parts are required. thanks

 

Yeah they are called LT4 heads for a LT1 motor.

 

so these are lt4 heads and not the standard flow fast burns? my friend found some that he might get a good deal on and wanted to make sure they are compatible with a lt1. would he need an lt4 intake or will the original lt1 intake work. thanks

 

What he is saying is those are what GM did to use the LT4 technology on gen1 motors. Those are Gen 1 heads and would require a fair amount of modification to use on an LT1. If you want to use those heads on an LT1 you need to not get those heads but rather get LT4s.

 

To my knowledge, GM only makes 3 manufactures heads that will work on our cars. LT1 aluminum, LT1 iron and LT4. I'm not sure what heads were on the "baby LT1s" but they may work too if theyre different.

Traditional small block heads willl not work.

LT4 heads are going to be as close as you can get to what youre looking for and that would be p/n 12363287.

 

You can't use the cast iron heads from the "baby LT1" (265ci) on an LT1... the chambers are too small.

You can put a Gen 1 SBC head on an LT1, but you need to modify (weld closed and redrill) some of the coolant passages so they match the "reverse flow" passages in the LT1 block. Then you need to find an intake manifold (LT1 intake manifolds are routinely converted - more drilling and welding - to fit Gen 1 heads) that will fit. If you opt for a Gen 1 intake, you need to address the issue of the coolant connections that exist on the sides of the Gen 1 intake manifolds. Obviously since the Gen 1 "fast burn" heads do not offer any advantage over the LT4 head, it wouldn't make any sense to invest the time and money required to convert it to work on the LT1 block.

Go to Advanced Tech and look for the threads on the SB2.2 heads. How close to 400cfm are you looking for?

 

ok, i think everything is clear now. the heads were an ebay auction that a friend was lookin at and had some questions. the auction comes with a lt4 cam so i suppose thats wehre the confusion came in at. so basically those are a no go. thanks for the help

 

hows my bro's car working out for you?