For a 350, its about 3k......rebuild with forged pistons, AFR heads, hyd. roller cam, Edelbrock Ari Gap intake, and 750 cfm carb. Then, a 3k stall would finish it off with 3.73s or 4.10s.
For a 383, about a 1k more due to extra machining and the rotating assembly.

 

I got a 383 for my 1984 K-10 from here. http://www.sehrpower.com/
Its fully balanced and I opted for the Sportsman II heads.

If he has lots of money to spend he could get a small block 427. I always wanted to build one of those. Incase you are wondering, Yes I do mean small block. World products makes the block.

 

383, dual quads, longtubes, WILD cam, 4.11 gears, lightweight driveshaft, weight reduction, and a badass stall.....

Oh yeah, weld the front bumper of a 4th-gen Firebird on there for some aero! lol

 

I'm enjoying this thread... my truck is all original... 305, 350 trans, 2.73 gears.... so I'm taking notes.

 

take lots of notes... don't skemp on the quality. it'll haunt ya down the line.

 

406ci, 383ci, or 355ci, 0 deck the block, good flat tops, Nice rods, good crank, Trick Flow heads, Victor jr., 800ish cfm carb, 240ish/250ish solid roller with about .630 lift on about a 108LSA.

TH350 built good, 3500-4000 stall (more like 4000), 4.10's or 4.30's.

 

Highly variable depending on the specific parts he uses. I say if he isn't going to go nuts with nitrous go for a SCAT cast crank, SCAT I-beam rods and Keith Black hyperutectic pistons for the rotating assembly. Canfield/Trickflow heads are a good $200 cheaper than AFRs, so thats something to think about. A flat tappet cam would make less power but would be a ton cheaper than a roller valvetrain. Etc. etc.........

 

NO kidding, I am definantly taking notes! all I have is MSD ignition, flowmasters and a transmission kit

I got smoked the other day by some guy in a Mustang, it sucked...
We were already going 70 so its not like I had much more, it would have been better from 0 to 100+

but yeah good information

 

There is some good info and some bad info in this thread. He will not need a BBC or any type of boost or nitrous. Go with a 383. Do not buy hyper. pistons. Best bang for the buck would be a set of forged TRWs. Shoot for around a 11:1 cr. A SCAT cast steel crank ($269~) is a good part. It's what I'm running for now as a matter of fact. Next, I would look at the vortec top-end kits from SDPC.com. Go with a 1-inch carb spacer and an 850 dp holley. Atleast a good HEI distributor, I run all MSD parts. Then a set of cheap 1 5/8 headers will do just fine.

For the tranny get a 3000-4000 verter, get the th350 rebuilt that is already in it, and you will need a tranny cooler! Out back that 10-bolt will last for now. So I'd just install a full spool (does fine on the street) with a set of 4.10s and a 28" tall ET street.

You'll be at 12.80s trapping about 103-106. Good luck!

Here is link to a site for my truck...67 Chevy

 

Good info, but I disagree about the pistons. Myself and a few people I know have had great success with KB hyperutectic pistons. Mine were in an NA engine, but friends have run them in 525hp NA engines and nitrous engines with up to a 150 shot. I don't know about any other hypers, but KBs kick *** and I would buy them over TRWs any day of the week. If you are going forged my opinion is to spend a little more and get SRP, JE, Wiseco, etc... Check out the LT1 guys over on camaroz28.com running KBs in 500+HP 383s.

Vortec heads are certainly something to consider. I haven't been too interested in them since aluminum heads are pretty reasonable. I didn't even think of the ignition but an HEI is definitely the way to go and you can't go wrong with MSD.

Anywho, lots of information here for Dry_Kill's friend to consider.