Ok still in the early stages so i could use a little help.

So its time for a rebuild i talked to jason down at RPM today and it looks like the labor is going to be around 800 bucks in labor for the rebuild to balance and punch her out.

I could use help picking a carb and manifold.

Here is what we have planed.
1990 Chevy 3500 Tow Vehical/Work horse
TH400 trans (factory
14 bolt posi track with 4.10s (factory)
.30 over bore Forged with 9.5 CR. Thats up from a sorry 8.7 CR
voodoo hyd 256/262 112 LSA
Holley 670 or 770
carb Intake manifold
Rockers
valve springs
push rods
timing chain
oil pump
fuel pump
water pump

 

What are your final goals for this one? I can't really help since big blocks are way out of my territory, but they're kinda awe-inspiring. So make sure you don't leave us hanging at all on this one!

 

on the carb id probably go 770. and is this to go fast or just tow?

 

Just to pull. Its going in a duel wheel truck used for heavy towing.

 

I've got one of theses 800cfm electric choke Quadrajets on my 454,great carb for both pulling power and mileage,well mileage for a big block anyway lol.
It will work well with a Edlebrock Performer intake for spreadbore.

http://cgi.ebay.com/ebaymotors/Quadr...171|240%3A1318

 

Lol yes i think i might get 10 MPG on a cool day going down hill with the wind pushing me.

 

Good luck on your build. RPM does great work.

What's the lift on the Voodoo and what ratio are you going with the rockers? Is it the 512/530 lift 60201 cam? I think I would try to get lower duration and get your lift through higher ratio rockers if possible. A smaller volume intake will help with low end torque also.

I would go with the 770 as far as the carb goes. What size are the combustion chambers and runners on the heads? Are you using manifolds or headers (if headers are they shorties, full length, etc)?

I'm wanting to go with a 454 stroked up to a 496 so color me green with envy.

 

That's about as good as it gets with mine too,4:56 gears aren't helping any lol but it will pull anything.

 

Very nice if you ever want to sell that thing you let me know first