Chevelle Tech - View Single Post - '85 1/2 Ton Squarebody 400 SBC build?
View Single Post
post #5 of (permalink) Old Feb 3rd, 19, 6:44 PM
BillK
Super Mod
Mr Bill
 
Join Date: Aug 1998
Location: Waldorf Md. USA
Posts: 11,736
Re: '85 1/2 Ton Squarebody 400 SBC build?

I had a similar experience as Ray. I had an 85 K5 Blazer that I bough new. 4WD 305 700r4 3.08 gears. It really was a pig towing. The trans started acting up around 150K so I bought a GM reman and at the same time took out the 305 and built a basically stock 87 350. Main difference was the hydraulic roller cam. I took everything external off the 305 including intake, carb, distributor etc and put it on the 350. Actually picked up a couple of MPG and major difference in power.

In your case the 2.73 gears are a killer if you want to tow. A 700r4 would help with the low first gear. Depending on what size tires you have it might not be much different that mine was with the 3.08's



I would build a basically stock 400. 8.5 - 9.0 compression so you can run it on 87 octane. Small basically stock hydraulic roller. You could probably do the same thing I did and just use everything from your 305.

Bill Koustenis
Advanced Automotive Machine
Waldorf Md


To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


1971 Heavy Chevy - original owner
1984 Buick Riviera - original owner (Wife's car)
Team Chevelle #100
BillK is online now  
 
 
For the best viewing experience please update your browser to Google Chrome