355 rebuild

I received a 355 in a trade the other day. I'm looking to freshen up the engine and change somethings to make 400hp 450 ft lbs out of Its. I am mainly looking for what cam intake combos will work for the heads I have to make this much power. Its going in a street/ small amount of strip 91 Camaro rs. Running a th350 trans with a 2500 or 3000 stall with a 150 no2 shot

Current spec
4 bolt main block
Twc .30 forged pistons
GM steel crank
GM rods
Eldelbrock 6089 heads
Comp 1.5 roller rocker
Comp cams (don't know the duration or lift but is a solid lift can with an aggressive idle)
Eldelbrock rpm air gap
Holly 850 do
Not really looking to change to a 383 yet any advice would be greatly appreciated
Engine was in a drag car when pulled


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Just a few questions, what cc are those heads, 63cc 0r 67cc and what compression ratio are those pistons or what does it work out to be with those heads. The other parts sound good.

Not for sure on the compression but I do know it will run fine without any detonation problems on 93 octain. The heads are 63cc heads