Cam!!!!!!!!

Now i know the alphabet cams are a little out dated but i got a new B cam givin to me, and i would like to know about PTV clearance and valve springs.
i have pretty much a stock motor other than a cold air intake, 65mm throttle body and spacer, gt 40 upper and lower intakes, underdrive pullies, shorty headers, 2 1/2inch x piped with flowmasters and 373 gears, t5 tranny and steeda tri-axe shifter. The heads are stock completely, the car is driven in the summer and at the track a few passes a season. if there is any insights on the installation and PTV clearance and valve springs it would greatly appreciated. i dont want to damage the motor, and want to pay once and do it right the first time.
 
Letter cams are still good ot use. True there is better stuff out there.

Friend of mine was trapping 106MPH with a B came, Cobra intake and GT-40P's.

One thing about the B cam, it makes it's power up top, so be prepared to rev the crap out of the car
 
dumb question

since im new to this and cant make my own post i just got an 88 t-top 5.0 5 speed with this i got uninstalled gt 40 upper and lower i bought 75mm mass pro m 75 mm egr spacer 75 mm throttle body 30 pd injs none of which is installed my question is gt 40 p heads with an e 303 cam what size roller rockers 1.6 or 1.7 and what about my push rod length