I guess it depends on which 351 you want to put in. A 351W will go in with mods to the exhaust the only setback, but a 351C will require lots of modifications. I guess more info is needed to answer your question.
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74 Mustang II
351W 9" Rear 4.11's
70 Camaro RS
9" rear, mini spool 4.56
406 SB M20 trans
Driveline Technician
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