I have a 1995 Jeep Cherokee that I am looking to swap a SBF into. The only swaps I can find online are 302s. I was under the impression that the blocks are very similar. I have no problem with a 302, but my grandpa has an '86 F150 with a 351w HO 4BBL that I could get running. Also, what kind of fuel economy would a 351w HO have in a 3000 pound Jeep? Thanks.