what 4:11 posi is the easiest to install? and works well?

[titanica217]

I have 500+ hp and a 5 spd on my 81 el camino. I've never swapped a rearend.

 

[custom442]

Re: what 4:11 posi is the easiest to install? and works well

I have 500+ hp and a 5 spd on my 81 el camino. I've never swapped a rearend.

Not sure about the rear end... But, is that hp# at the crank or the wheels?

 

[titanica217]

at the crank. It's a 350 with a steel crank and pistons, bored .30 over with a weiand 142. hyd. roller flat tappet cam .495/510, 292/301. I came to the conclusion i would need 4:11 gears on my own, but i'm pretty ignorant for the most part beings i'm not an experienced mechanic. any suggestions are very much appreciated. thank you.

 

[custom442]

It depends what type of transmission you have, I'm guessing a TH-400?

 

[custom442]

:lol: :lol: Ok you have a 5 speed, go with a 3.73 rear end if it will fit.

 

[titanica217]

sorry, forged al. pistons

 

[titanica217]

really. that's great news. thank you so very much, i'll look into it!

 

[custom442]

If you get a 4.11 rear end on the highway you might be siphoning gas from someone in a few years. Youre welcome

 

[titanica217]

right on. can i just swap the gut's in my 10 bolt? is that kind of ratio available in those easy change limited slip or magnetic lock out diffs advertised?

 

[custom442]

That's what I don't know. Some other guys will help you on here though.