Thread: 402 needs more power (heads & cam)

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Hi guys, I'm Tim 22 yrs young and live in Switzerland.
Since 2012 I own a 68 camaro with bigblock and 4 speed. Now I'm installing a tremec tkp 600 trany.
And the project for the next winter should be the engine. The engine is a stock 402 bbc casting i think 3999290. Heads are cast iron. I can spend 2-3k$
I need advice how and specially what I have to do. I'm thinking about aluminium heads, and a hyd flat tappet cam. Pistons and crank are stock. I have headers (brand unknown), msd ignition, mallory distributor, edelbrock performer rpm intake and edelbrock 600 cfm carb. I also have one or two 750 holleys..
so due the price I prefer to let the crank and pistons stock. Engine is rebuilt 1000miles ago.
But now my questions is how high can I rev the engine with stock heads and pistons? I'm a bit afraid to rev it up like hell.. Rpm limit with new heads and cam?

Which heads do you recommend? I'm thinking about rpm performer or brodix rite ovals. Cam?
Should be streetable, power from low rpm.

I have never done this before, so I hope you could help me to choose the right setup.

Thank you so much!
And if you like I can ad pictures of my car