I had one oem in a 67 SS Camaro with rock crusher 4 speed and 3.73's.
It's essentially the same engine as the 425 hp 427 only with a smaller bore.
Same heads, cam, crank, rods, etc etc.
A heck of a nice hot street motor in totally stock trim. Totally driveable
on a daily basis, nice lope to the idle, super throttle response at nearly any
rpm, and even acceptable gas mileage considering. Even tho the hi perf
454's have more torque, I'd take one of these or a 425hp 427 any day.
Very streetable and good performing cam for it's day. Engine would rev
7,000 with no problem, altho that's on the down side of the hp peak
so shifting at 6,500 or so kicks the rpms down closer to the high side
of the torque peak which gives better acceleration response.
IF it's in good shape, I wouldn't get too excited about doing anything
inside the motor. Good long tube equal length headers with a good
system behind it, maybe an aluminum flywheel for a stick if you've got
decent gears and/or a relatively light car, or a 2600 or so stall for an auto,
altho without lockup that wouldn't be the best for a daily driver. Or you
could check into a built 200-4R from Bowtie Overdrives, then you can
run decent gears and overdrive and a lockup converter.
I happened to be able to work a swap for an L-88 open plenum dual plane
intake and one of the old 950cfm 3bbl Holley's. With some tuning on the carb,
that really seemed to boost it in the higher rpm ranges.
Last edited by macx; 01-11-2011 at 11:34 AM.