273 to 340 swap

Mark Nixon said
The '308 heads used the smaller exhaust ports like a 273 has, which makes using the stock '64-'66 273 manifolds more feasable.

Get out of here...really? Smaller exhaust ports on a 360 head? Who would have thought......were the 302's the same size then? :popcorn:

This is awesome, a 13 year old post is getting play again!