340 For street duty

My 340 is built as follows:

early style high compression pistons (CR about 9.5:1)
stock x heads
Comp XE 268H cam
RPM Air Gap intake
Summit racing headers
Holley Street Avenger carb
electonic ignition
and everything else stock

I had it on the chassis dyno about a month ago and the numbers calculated out to be 340 hp at the engine. This was without the ignition timing tuned in and a stock out of the box carb. So there is more to gain from tuning it in. With it all tuned in, I'd expect it to put out about 350-375 hp at the engine