I'm buying a 12,000 mile Goodwrench 350 from a friend, gonna have vortec heads, but the internals are gonna stay the way they are....
Assuming I get the right cam, intake, carb, etc., should I be able to spray the motor withotu worrying about it? How much? Thanks

 

If you have an adequate fuel system, and adjust the timing accordingly, you could run 150 shot with no problems to a stock cast piston crate motor. Just remember to run colder plugs (NO PLATINUMS!!!!), and use good fuel....

My first motor was a goodwrench 350.... I ran 210 hp shot through it for 2 years and never broke it. I however don't recommend this... lol... I actually pulled the engine, and sold the short block to a buddy for $200.... It's still runnin great...

 

On a side note, I can tell you the vortec heads like less total timing than a regular sbc casting. I've seen best results with around 30-31* on a flat top motor. Your dished pistons are going to have less than optimal flame travel so I'd say around 28*
or so would be a good starting point just on motor.