Im planning on building a nitro pro stock car. I dont know wat engine to start with. Big block or small block. im thinking big.

If you are running in a class, then you have to use a small-block in Pro-Stock. The only use for a big block is in Pro-Mod, Funny car or Top Fuel.

The Novarossi 353, RB V-15 Rody or even the .18 TZ can be used and run very well in Pro-Stock. Good luck.

Thanks.