Quote:
Originally Posted by ShipC1970
Why is that and how is that? So I have the original 70 block and matching heads. So hypothetically even though it’s from a ford mustang and I run it in my mustang in GT/QA or PA and say it’s a “mercury” engine I could run a 4150? Who checks this by the way? Forgive me for all the questions I’m new!
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No worries, it's confusing to everyone. In "GT" you are allowed to run any engine combination from the "family." For example a 283 in a 4th gen F body, or a pontiac/olds/buick 455 in a camaro. To run a 68 302, you could use your block, but you'd have to find a set of heads for the 68 4bbl engine. Whether it's true or not, the paperwork exists that a Mercury 302 in 1968 was available with a Holley, whereas the Ford cars had the 4300 autolite. So, long story short, to answer your question, yes. You could run a 1968 4bbl 302 with a 4150 in your 1970 mustang in GT/QA or GT/PA.