Quote Originally Posted by techinspector1
I probably shouldn't say this, but I'm going to anyway.....

Son, you may not hear from Pat again. Your question about roughest idle nails you as a poser because you're concerned with impressing the geeks at the drive-in with a ratty idle. Pat gave you his best shot, a cam with a very wide power band, reasonable duration for the static compression ratio so that the intake closing point matches up, long lobe separation angle for high manifold vacuum to operate accessories, excellent carb signal and reasonable valve lift for long spring life and easy operation on the rest of the valvetrain. He further estimated 500 ft./lbs. of torque from the motor. Horsepower will be unimportant in moving that big hulk of a Blazer. Pat knows what he's doing with big block Chevys, but I don't think he's too tolerant of youngsters yankin' his chain.
You know I am young 26 years old, but if I remember every big block my old man has ever built had a hell of a cam in it and would just about shake the fenders off. They would also run like a raped ape, the last big block he had in a 66 nova with the 871 blower and twin 850's had the ''rough idle'' and the largest mickey thompson tires on back of it that you could put. That cam in that car didn't seem to stop it from spinning both back tires running 55mph down the road when he got on it. Now I know that he had a blower and aluminum heads and didn't need alot of vaccum for this application. Next motor was a ls1 and my brother has a ls1 and both of them have a large cam that is very noticeable for a fuel injestion car and they run like a bat out of hell also. I am not doing this for drag racing but to just pep the motor up a little bit. I will for sure want to show off at the car shows with my rough sounding big block, I think it is cool and do a lot of other people. I guess it is just preference. Sorry for trying to learn a little something!! I guess you might also ask if your old man knows so much about big blocks why are you here asking questions, well I like do things on my own without the help of my old man ( don't like seeming like a youngster that doesn't know a lot about motors and cams). Thanks for the help.