This may not be the answer that your looking for but I swapped a 429 into my 1982 F-100...It was a very easy swap using bolt in parts..My truck originally had a 302/C-6 which was very gutless and got 10mpg on a good day!...The 429 improved my gas mileage by an easy 4 miles per gallon but even more impressive was the power increase.

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1968 mustang..408 windsor.Vic jr heads and intake.Pro Systems 950HP holley, 1 3/4 hooker super comps,Custom CI solid roller camshaft,Probe shaft rockers, 4 speed with 4:11 detroit locker.