I am doing a 454 swap into my 83 bird is there anything i can do to the factory 10 bolt to make her hold for a while?

 

If you be nice to it, it will last for awhile... if you abuse it, it will break right away. Not much one can do for a 7.5".

 

well if i got on it a time or two think itll last?

 

no.

 

If you have hard tires that spin easy then it might be all right for a while. If the transmission shifts hard then it might break it. Just be easy on it and it will be all right.

 

I know a guy who has this setup: stock '86 454, TH400, 7.5" 10-bolt, 255/50R16 on stock 16x8". He broke the first axle when he installed a shift kit, so he installed another axle. When he broke that, he un-did the shift kit, and installed a third axle. Then he says he tried a cam swap, with an Edelbrock intake. That worked out, so he bought Hooker's swap headers. That killed axle 3. He took axle 1 apart, and ordered all new aftermarket upgrades for everything. 28 spline Moser axles, TA girdle, Ratech adjustable crush collar, Eaton posi, Richmond 3.23:1 gears and Richmond-sourced bearings. That axle is what's still under there, and he says he never dared to try sticky tires. No report on the first 3 sets of gear ratios, nor what broke in any of them.

 

I have a 87 Berlinetta with a 396BB, TH400 w/3500 stall and 7.5 10 bolt with 4.10 gears and 26 spline axles. I use 9 inch M/T ET Drags. I've probably made 25 passes this year. Best time so far is 11.98 @ 112mph. No problems.....yet. I imagine a transbrake would change things.

9 inch with 4.56's and 31 spline axles is in the works.

I know I can't cheat "differential death" forever.

 

Think of abuse as shock. A transbrake, extremely hard shifts, etc will put it at risk. But if it's pretty linear application of power (even big power), you might be surprised how long it will last. I've dropped more than one BBC and LSx engines in these things, oftentimes with superchargers or nitrous. I'm not the abuse type though, figuring I'll just catch them on a roll ...

Mike

 

having a 454 in front of a 7.5inch 10-bolt is like marrying the woman of your dreams and not having sex with her. Ever.

...TraviZ, you better get that catfish in the twelves son! She can do it.

 

Lol thanks, its more of a daily driver, and here a bit off topic, but its got a few minor mods since i raced it years ago. Lid, muffler, 315 tires.. lowered, lca brackets.. but i dont think that will help much, I plan to put a fresh motor in next year sometime, and i should have 4.56 gears by the end of the year. 3.42 right now

 

Well Any suggestions on what to put under there?

 

The only thing you can do is save your money and get an after market rear end for it. There are 12 bolt and 9 inch Ford rear ends that are built to fit these cars. They are not cheap, but you won't break one of them. The Moser 12 bolt with Eaton Posi starts at about $2220 plus shipping.

 

ok cool i guess ill look into that i have to finish the motor build but i think i can flip the 2200 when the motors done.