I pulled the turbo 400 out of the RV.. that 454 was just screaming at 55. Put a 4L80E in there. 4 sp/W OD. Now I can go 60 and still only tach around 2000 rpm.
the damn computer to make it go was an expense. Motor home is an 87 P30 chassis, so HEI ignition and the good old fashion Rochester quadrabog carb.