can anybody confirm that a 1974 391 has only 7.4 to 1 compression?
will 390 pistons raise compression? or should I just get FE heads/intake?
the 391 runs like a swiss clock, but while adequate power is there, I want more...
also, anybody know the compression ratio and HP of a 1979 370 2v? 4v?
does it use the same timing chain setup as a 429/460? I was thinking of advancing the cam timing that way.
I just replaced the OEM duraspark, as it was speed limited, with a petronics setup, that alone feels like 20 hp. (plus its way faster)
it runs pretty good, but I will have to find a 68-71 4v intake and install an edelbrock carb. (I'm afraid to mount the HD thermostat housing on an aluminum intake)
also,my second 1979 F-600 has an eaton 2-sp axle in it, code F2M, and a trans code of 2A. I'm pretty sure that the trans is an OD unit (clark)but I'm not sure.
anybody have a shop manual that would tell me the axle gear ratio?
1994 Bronco, 1996 Bronco, 1973 F-750 Dump, 1979 F-600 Crewcab Flatbed, 1976 F-250 2wd, 1997 F-250 Powerstroke Supercab 4x4, 2003 Mercury Marauder 2 2007 Crown vics, assorted other boring vehicles...and my own NAPA store.