The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - '68 COPO Concept

darkhorse970 · 11-02-2013, 10:49 PM

I decided that I wanted to have my engine dyno'd so I took it to a local engine shop to have them tweak and tune it a bit. Its a fairly mild build. The basic stats are:

427 BBC bored .030 over
Closed Chamber factory heads, mild porting and big valves
10.5:1 compression
Comp 268XE cam
Performer RPM intake
770cfm Holley Street Avenger

The results were 490 hp and 556 Tq, all below 5500 rpm. I am very happy and think it will certainly be fun to drive! (Now I am really motivated to get this truck on the road!

11-02-2013, 10:49 PM	#32
darkhorse970 Registered User Join Date: May 2009 Location: Monroe, LA Posts: 2,103	Re: '68 COPO Concept - Vulgar Display of Power I decided that I wanted to have my engine dyno'd so I took it to a local engine shop to have them tweak and tune it a bit. Its a fairly mild build. The basic stats are: 427 BBC bored .030 over Closed Chamber factory heads, mild porting and big valves 10.5:1 compression Comp 268XE cam Performer RPM intake 770cfm Holley Street Avenger The results were 490 hp and 556 Tq, all below 5500 rpm. I am very happy and think it will certainly be fun to drive! (Now I am really motivated to get this truck on the road! Attached Images __________________ Keith SOLD - 1963 C10 Short Fleet 350/700R4 4/6 drop 1967 GMC Super Custom - Short Fleet COPO concept w/427 BBC T-400 w/Doug Nash overdrive 4/6 Drop, Buddy Buckets, etc... Frame Off (In Progress) I call it "Vulgar Display of Power" 1980 Silverado Original paint 49k Original miles 4/6 drop Check out my build thread here: http://67-72chevytrucks.com/vboard/s...=1#post6209941 Last edited by darkhorse970; 11-02-2013 at 10:55 PM.