Schweet97Z

so i got a killer deal on a set of GTP (Gallant Technical Performance) stock casting ported heads. i dont know much about the heads or the company and if anyone can chime in on if they are a good company that would be great. anyways, these heads are suppose to flow 265 intake / 210 exhuast, and i really want to run the gm-847 cam. the heads were used once before on a car, and i gave them a well known engine builder and racer here on the east coast, andy jensen. he bead blasted and hot tanked them. gave them a valve job and machined the valve spring pockets deeper for the right install height of the springs. what do u think the est. hp will be? whats the highest you can rev a stock bottom end lt-1? also i want to replace the lifters, which lifters would be best for the set up?

Schweet97Z

also would a 100 shot on top of all this send my motor to the grave or would it be fine?

Injuneer

GTP heads were popular back in the late 90's. I think the guy who did them was Craig Gallant. The ones I've seen flow tested were very well done. But LT1/LT4 head technology seems to have improved immeasurably over the last 10 years, so the numbers you are quoting seem to be fairly "average" by today's standards.

Schweet97Z

thanks for the info fred! any knowledge you would like to share about the other questions i had?

Javier97Z28

Should be an 11 second combo on motor. It'll take spray for a while, but it'll most likely let go after a while.

Schweet97Z

i doubt ill see 11's for awhile since im still on the ten bolt and i dont have a stall yet. will i need bigger injectors and throttle body? if so what size for both?

Javier97Z28

Don't put a big cam in there w/o a stall, you'll regret it.

Automatic cars don't need to worry that much about the rear. I've been pushing my stock rear for years now, 300+ passes, and it's still ok for the most part pushing 1.6x 60' times.

Yes and yes on the injectors and TB...

I picked up 30lb svo's but kinda regret it now, wish I would have gone bigger just in case they max out, hopefully they won't. TB if you're gonna buy one might as well just 58mm.