Gold Lifetime Member 
Don
Join Date: Jan 2005
Location: 2 Dog Town in West Texas
Posts: 11,154
Re: New Vortec 350 cam question
Are we talking about just a spring change here? Does this motor have a roller cam and lifters? If so, this type of change should just raise the rpm limits with in turn moves the motor up into a higher power band.
If you are just changing springs on a non-roller set up, be cautioned that you are increasing load on the flat tappet cam and lifters, which could lead to a cam/lifter failure.
Not sure which vortec cam you have but there was one that came in a ZZ4 motor that was a good cam .
Don
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968
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