Stop in for a cup of coffee

360DartGT66 said
So ... the B block would fit just as well in a 74. But the RB is taller which puts the exhaust ports higher up too. Maybe that causes more clearance issues?


I suppose it is necessary to add the reinforcement tube you always see when they're gone, right? And then you might as well go coilover?
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Yes, This is why ma Mopar installed mostly 383' or B blocks rather than 440's or RB blocks in the A body. Lots of A bodies with 440's, out there, but it is a tighter fit. This is also why guys take a 400 B block and stroke it up to 500ci, It fits better.