8 3/4 axels???

805moparkid said
not to steal the thread but i have a slant in my 68 dart (street,strip) thats at 200hp soon to be more like 300hp, also redoing the stock 904 with 4200 stall and manual valve body. so i have an 8.75 741 case 3.91 gear set up, just need axles and 742 case. so my questions are
what axles/bearing do i need for my hp and conditions
also do the posi's swap from a 741 to a 742,489??

thx guys

A 741 case sure grip can live behind a 300 hp setup pretty well .

I have a 741 case with 3.91 gears that started out life in an early sixties A-100 van behind a 6 cylinder three speed. Then after 100,000 + miles is was rescued from the scrap yard had a sure grip from another scrap yard victim (72 challenger I think?) installed in it. We then put it behind a 1970 RT charger with a built 440 hp engine. Afetr a year or so of driving and street racing it was removed and installed in a 383 poered 1966 Coronet, two years and many miles later the third member was removed and sat on a bench until I bought it a put it in my 1967 barracuda with a 340 engine. It saw about 6 months (10,000 miles) of use in my cuda, then was removed and sat on the bench for several years. It was installed in my 1973 dart sport 340 , which is used as a race car and raced every weekend from march through november (about 150-170 runs per year in a low 12 second car). After two seasons of that I have replaced it with a 742 case 4.10 chunk.

The point I am trying to convey here is: a 8.75" 741 case maybe weaker than a 742 or 489, but it is much stronger than most rears (including anything that came in chevy ). Only rears that came in muscle cars that are stronger are a Dana 60 or a Ford 9". That third member should hold well behind a 300 hp engine!!

Bob