Heads for 92 4.3 Vortec V6

I have cracked both heads on my 92 4.3 V6. Can any one tell me the interchangable years for the heads? and does it matter if its a CPI or a TBI if I'm just changing heads? I was hoping i could use a set of heads out of a older van or Monte Carlo or something like that with a 4.3 in it.

Thanks in Advance
Ia_Venom

I have a 1993 4.3 W series...and there are many of these around so go to your local salvage yard and they will answer your inter-change questions...ask around it is free to ask...Best Wishes :o)