In need of motor help

[z400rider8787]

so i picked up a 70 GMC LWB and i wanna turn it into a high performance street/mild strip truck. Im gonna be building a 350 and i want around 400-500 hp with decent street manners. what i have so far is an 010 block, an oem forged crank and powdered metal rods. I've already picked out some decent aluminum 200cc heads but i dont really know what type of cam or carb i need. i want a good choppy idle but i dont want to end up over camming it. i was considering roller, if its worth the money. Im gonna run forged pistons in case i wanna spray it some day. but i guess the question im trying to ask is what is a good motor combo to go with? Im relatively new to this and dont know too much

[72 SUPER10]

i ran a 355 with old 202 double humps a long time back with a 11.1 dome 30 over and a 501 hyd, it may have had a 292 duration not sure , but it ran 8.50 in the 1/8 th and on 125 shot 7.70s its been a while so im real close on the figures hope it helps , oh it was in my 72 truck also. good luck vince

[Marv D]

Originally Posted by z400rider8787

so i picked up a 70 GMC LWB and i wanna turn it into a high performance street/mild strip truck. Im gonna be building a 350 and i want around 400-500 hp with decent street manners. what i have so far is an 010 block, an oem forged crank and powdered metal rods. I've already picked out some decent aluminum 200cc heads but i dont really know what type of cam or carb i need. i want a good choppy idle but i dont want to end up over camming it. i was considering roller, if its worth the money. Im gonna run forged pistons in case i wanna spray it some day. but i guess the question im trying to ask is what is a good motor combo to go with? Im relatively new to this and dont know too much

400-500 HP with 'decent street manners' out of a 350 ain't gonna happen without some form of boost. OR, You better be REAL picky about the heads. Remember the Edelbrock 420HP PRM package??? you want to know how many motors blew upon the dyno trying to make those numbers????? You need a head flowing BETTER then 240ish cfm, pick a cam that puts lift in the operating range you want to make this 400-500, and then make sure you build it so it will tolerate the RPM's it's gonna take top get there. Not trying to be a pesimist or pee in your wheeties, just your asking a LOT out of a little 350, pump gas (I asume) street motor.

But... to make that goal,, I'd build a blow-through turbo package about 8:1. hydraulic roller with something like the new Brodix head or for a little tamer a set of AFR 195's (you don't neeed a boatload of head when the induction is rammed down it's throat )






(you do know I just spent around $15k of your stimulus $'s don't you )

[70rs/ss]

I'm w MarvD you need a power adder or more cubes, a 383 would do your 500hp goal easier, but the heads are still the weak link. A nice solid low compression long block with all the goodies as far as pistons, rings, and ARP bolts, then boost the wee out of it, add methonol injection and you should have a super tame fire breathin' beast!