Good, sure.

Best? I don't know.

What size valves, billet head, what size/flow carb? 308 with stock rockers sounds kinda small to me, but if you are running a stock carb and head, it might be enough. Even then, the additional cubic inches of the crank would make this engine combo very asthmatic with a 22mm carb.
To me, I'd rather build the engine "bigger" and make more power out of it then try to hook that power up. I've never met a customer that cried about having too much power. :)
308 with 1.3:1 ratio rockers sounds like a good combo to me with a good/big Mikuni and some decent headwork.

Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Chassis
Vector Cuts
(25 years full time serving the karting industry)
215 N. High St.
Linden, IN 47955
I have a 3 inch model 15 with a stroker in it with a sachs billet head an a e.c x380 an run a 308 with 1.25 roller rockers. pvl. ign. run on a 1/8 mile track an motor is very strong. turning 8200. some people turn them much higher. hope this helps. joe