I'd just use a 390 4 barrell Holley. You don't really want triples with factory air? I assume you are talking HQ-WB here?
Use an M20 4spd with a 3.08 or 3.36 diff. Don't use an M21 behind a 6cyl in a big heavy van - you'll hate it!
I'd just use a 390 4 barrell Holley. You don't really want triples with factory air? I assume you are talking HQ-WB here?
Use an M20 4spd with a 3.08 or 3.36 diff. Don't use an M21 behind a 6cyl in a big heavy van - you'll hate it!
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