best things to gain performance on a gte engine

[paradise]

as above got a gte motor in my nova need to get some more bhp ...

[Will F]

Carbs

[Mazz]

Nice and blunt! Depends on your budget I suppose...

[John]

Red top yo!

[Stuart]

AST2 Cam, Carbs and an ashley exhaust manifold (ok there are better out there but its diminishing returns at that point).
Add a ported and big valve head if you can find one.

circa 130-140 depending how happy the rollers are and how good the setup it.