Re: help
 

I would try another carb, Holley, AFB , Q-Jet, etc to see if it slows down or picks-up ??? Also, how about a Chassis Dyno ??? They can find lots of things and save you Time & Money, no to mention pulling
all your hair out ... Maybe a bad connection / ground or a wire over heating ? It's always tougher when it doesn't miss or backfire etc ...
* Keep us informed & good Luck....

Re: help
 

Rob check brake system real good sometimes a brake line (factory rubber coated ones) will not let brake fluid return causing the rotor(s) or drums to stick on after applying the brakes. Or make sure nothings bent somewhere.Does the car coast? See if after holding the brake pedal the car rolls. or see if they stink from heat. Sounds dumb but ive been there. Keep us posted and good luck. Mike

Re: help
 

If you lost the three tenths between the last week of June and the first or second week of July, consider the radical weather change. If you were jetted a little rich last month, you are way too rich in the oppressive gunk we've had for air this month.

Change your metering rods, and you might regain half of what you lost.

Re: help
 

Have you been logging your air/fuel with a wide band? You should do that, besides tuning it's a good reference when something like this happens.

Re: help
 

no its just been slow since may very consistant but slow

Re: help
 

I had a very similar problem many years ago with my 71 Duster stocker. Changed everything, ignition, fuel system, trans, convertor, etc. etc. Nothing I did made any difference so far as being faster or slower. Turns out the 8 3/4 rear end housing had bent after MANY years of use and abuse. I didn't have a brace welded on at that time. The way I found it was I was going to install my spare hogshead to see if that was the problem. It was near impossible to remove the axle shafts. It might be worth looking at.

Re: help
 

thanks i will tear it apart thursday after work i dont have a backbrace either and its old rear end

Re: help
 

I had a friend who ran A/SA with a hard-leaving car (G.M. 12-bolt) that suspected that his rear end housing was bent, and it was... pretty badly, BUT in just the opposite way you'd expect; his rear tires were toed OUT, not IN, as you'd think they'd be.

Go figure....

Re: help
 

i wanna thank everyone for the help and input i as we speak am ripping the rearend apart to inspect things thank you

Re: help
 

This is a good discussion! why a RacePack does wonders. hope you find your bug without to much exspense.