I want a cam to go into an otherwise mainly stock 350 with TPI - is the ZZ4 cam the best choice for:
Good idle, low speed torque...not really after grunt over about 4500rpm.

 

Good choice. Low end grunt and midrange power that will pull over 5500rpm no prob with a good idle.

 

According to GM, the ZZ4 makes its peak horsepower at 5,250 RPM's. That's with a Holley. How will a stock TPI setup affect the power output of the motor with this camshaft?

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1980 Camaro, '88 Police 350 engine, Headers, full exhaust, completely redone, my baby!
1988 Iroc-Z L98, MSD 6a, Accel coil, K+N's, Airfoil, Coolant Bypass, Flowmaster, Gears, Late model Bose, I like the 80 better

 

get at tpis super profile or zz9 cam, you will see huge improvements, won't affect idle with stock rockers

 

What springs/retainers etc do I need to run this cam in stockish TPI heads?