can i mod my old 4.3 to Vtech heads?

hello all

what can i do to put vortec heads on my old 4.3

i need some modifications to the heads but what are those mods?
if anyone know how to do it.. please post it... :D

this maybe help other people in the forum.

thank you

Maybe, What year is "old", and what year are the heads?
If the heads and intake are both 1995 or older, you will be OK if you get the right intake gaskets.

i have the same question i'm getting a 1998 blazer with a vortec 4.3 the block is cracked. I have a 4.3tb out of a 90 gmc jimmy. can i just put the intake and vortec heads on the tb block?

Quaizee if I am not mistaken u can fit vortec heads on your 90 block, but nalgman what year is your 4.3 out of because older models than 90 or 89 i cant remember exactly have a diffrent degree angle and the heads from a vortec wont fit w/o major work