Well really I am changing a few things in addition to cam. The only thing that is staying the same are the rear gears and converter. The motor is a low mileage and in perfect shape.
I am also considering how I use this car now. I doubt there will be any stop light to stop light and sure wont be any drag racing. Mostly highway driving speed limit 75 and above. The gears and converter both benefit here.
Right about now would be a great time to disclose what changes your considering as well as the gear ratio, tire size and the converters stall speed if you know it. No worries if you don’t. Someone here may know. Also if you have or are going to use headers.
One of the things I consider, like your doing, is the overall package. I like that you said no racing just cruising. In a broad statement, as well as usage, generally speaking, a cam of no greater than a duration of
[email protected] will work with a stock (read: low-ish stall) converter pretty good. If the converter is a low stall, back the duration @050 down 4-6*’s.
The gear ratio is the next factor in the cam selection as well as car weight with the cubic inch engine being used. Before we get into those last two, if the gear ratio is sub 3.21, I suggest the smaller cam over the
[email protected]. The
[email protected] will work OK with 3.21 with a medium to high stall factory converter.
3.55’s would be better. But not for the Hwy cruise speeds.
If your rear gears are below 3.00, go with a
[email protected] duration cam.
Even though the cams are smallish, they will offer improved torque over the small cams the big blocks came with. Also being your not interested in speed contests, a single pattern cam would be fine since the extra duration in a dual pattern cam just adds top end.
and I dont think it will hurt.
