I have a 70 GS 455. The motor is pretty hot. I am running a Muncie M-21 out of chevelle, and a buick 10 bolt posi with 3.23's in it. I just got the car on the road, and he gauges arent all hooked up, its still a project in the works. The problem is that the car feels like the gears are wrong in it. The engine has tons of power, you can feel it, but it just seems like its geared wrong. I know a lot of guys run muncie's and if Im not mistaken thats what came in the car from the factory. What rear should I be running? I have been wanting to scrap the damn 10 bolt from day one, and am going to step up to a chevy 12 bolt posi, probably with 3.73's in it. What do you guys recomend? Rob
If you can explain what you mean by this, you'll get better answers. How have you driven the car? Do you have a tach hooked up? What shift points have you been using? Etc. -Bob C.
reply... yeah bob, after reading it, I realized it was kinda vague. I guess what Im trying to say is that its a little sluggish for the size engine its bolted to. I had a pretty stock buick 350 with a 350 auto, and this is definatly faster, but pushing 600 on the dyno, I would expect this thing to launch like a rocket. I live on a 2 mile straight country road, and have been cruising up and down, experimenting with different shift points anywhere in between 3,000 and 5,000. The car will go quickly, but its not much for burnouts. I ripped the rear out of my parts car, which was a 455 with 400 turbo. I was told that this rear would have been ok for that application, but I have a 4 speed. I suppose I am just used to the chevelle I had with a 454 muncie and 373's. That thing was a screamer. I didnt think there would be a big difference but maybe I am wrong. Please keep the advice coming. Rob
