I have a 96 chevy pickup with a 305 vortec engine which has about 200,000 miles on it. I was wanting to put a 350 vortec block bored .30 over in it and I was wondering if my stock 305 heads would work or do I need to but a set of 350 heads. Also does anyone know if I can use my 305 intake on the 350 block? Any help would be appreciated. Thanks

you can use the 305 heads on the 350 block but you will increase compression as the 305 heads have a smaller comb. chamber, intake will fit also. if you are going to build the 350 from scratch with a new bore job,pistons are available for 305 heads on a 350, the rebuilders can't find good 350 cores(they are usually cracked) so the piston companies are making pistons for your combo in all oversizes.

Thanks, should I go with 350 heads due to the increased compression, or will it be ok.

you can use the 305's just be careful about spark knock, use good gas when makin the old truck work.

Thanks again for replying, this is a everyday work truck for me, so I probably should be on the safe side and go with the 350 heads huh.
Thanks

I am learning as I go. I think the 305 heads sound good. I have a question though. What do you mean about "spark knock"

pre ignition/ detonation, fuel mixture ignites before it is supposto, you get it real bad and your cleaning pistion material off the spark plugs.