EFI Rules and Carbs Drool
I've aquired some 351W heads and I was wondering if it would be worth it to use them on my 302 I'm rebuilding. The intake ports are much bigger, but the valves are the same diameter. The combustion chambers on the 351 heads look smaller. I think they are from a smog motor as they have the air pump ports. The 302 came from a 72 Bronco which I believe had 9.0 compression, so I'm thinking the smaller chambers might be too much and it doesn't have air pump ports. The cooling ports are much bigger on the 351 heads and I would probably have to upgrade to a 351 intake. Is that all worth it or should I just use the stock 302 head. I'm building a very mild street motor no more that 5000 RPM and just looking to enhance performance. But it looks like using the 351 heads would give me a 302 port job for free. Both heads need new valves and springs anyway. Thanks for any ideas.