SRT_DSTRHOLC
Well-Known Member
how much HP will a 741 case hold? I need to switch from my 8 1/4 4.10 sure grip to a 8 3/4 741 3.91 sure grip and I want to know if I should keep looking for the 4.10 or get the 3.91 he only wants 350 for it
using a 741 case
- Thread starter SRT_DSTRHOLC
- Start date
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Sweet price. I have had 450 HP to the 741 case for years of abusive driving. Drag racing the rear would be a different story.
varlo
Joe- Long Island, Oakdale
I have a 741 case with 391's that i plan on abusing a lot! :supz:
I'd get it. There was a whole strength analysis done on 8-3/4's a few years
ago and it was quite surprising just how strong the 741 was. I think the bigger
concern with them was the tendency to strip out the axle splines due to the
engagement of the spiders onto the axles. I have some pictures of them
someplace showing the 2 different dana type posi units. The one that only
have half as much engagement was more common in the 741 I believe and
the 742's had the full engagement. Doc diff could probably give you the whole
scoop on that. FWIW I had that split type spider in my car and I swapped it
out to the full spiders. The kit was 180 bucks for that alone so it might be
worth a look inside the pig to see if they are split or not.
ago and it was quite surprising just how strong the 741 was. I think the bigger
concern with them was the tendency to strip out the axle splines due to the
engagement of the spiders onto the axles. I have some pictures of them
someplace showing the 2 different dana type posi units. The one that only
have half as much engagement was more common in the 741 I believe and
the 742's had the full engagement. Doc diff could probably give you the whole
scoop on that. FWIW I had that split type spider in my car and I swapped it
out to the full spiders. The kit was 180 bucks for that alone so it might be
worth a look inside the pig to see if they are split or not.
65Vart
Well-Known Member
I picked up a 741 with a 391 SG for $200can. I was told they are fine for the street but be careful with slicks.
1wild&crazyguy
Banned
I run a 741 auburn 3.73 behind a 340/4spd solid cam,ported heads,headers,750 carb yadda yadda turning 68-7000rpm no problems.
clutch type is the best suregrip, the cones can't handle slicks and constant abuse as much.
clutch type is the best suregrip, the cones can't handle slicks and constant abuse as much.
SRT_DSTRHOLC
Well-Known Member
ok kool, If i can sell my rear.. I will piece everything together and get a 489 case 4.10s and a clutch suregrip
.........Ive used the 741 case in my S/SS car 4 20 years, with 12.2x31.25 slicks, not 1 failure.....11.001 et................kim..........
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