![]() I've considered the 255 width, and while it's a little bigger than my 225 (which are too thin), it was questionable whether I'd get the gain for the outlay, by gain I meant are they wide enough. So I'd have to change 4 tyres which gets pricey. For some that might not matter, but it would bug me especially with the big white lettering being different. I have Cooper Cobra tyres all around, so changing to to these rears will mean the fronts wont match. I need to be able to cruise at 70mph without too much effort - big lorries will pass me at 60mph over in the UK, but yes this could work if I used these tyres perhaps. Olds & Pontiac, both could have used that major upgrade a year earlier for their performance '66 A-bodys. For '67 Pontiac went to nodular iron casting of the 8.2 Pontiac 10 bolt center housings in its strongest performance rears to reduce pinion deflection. Olds engineers specified the Pontiac normal gray iron converging rib Pontiac 8.2 10 bolts in the manual transmission equipped '66 442's, as the torque of the early Olds 400's was destroying the Buick cast 8.2 10 bolts. The other really weak 8.2 10 bolt was the gray iron single rib 8.2 Buick cast 10 bolt rear used in '64-66 Buick A-bodys & '64-66 Olds A-bodys. The Chevy 8.2 is one of the two weakest GM 10 bolts ever built as they have next to no pinion support. I have avoided building the early 8.2 Chevy 10 bolts, have had many friends & customers blow them up with moderate hp/torque SBC's. ![]() To compound matters further, the '64- early '65 early Chevy 8.2 10 bolts used a much smaller height crush sleeve than the taller style used in mid '65 to 72 versions. The high ratio Chevy 8.2 10 bolt carrier accepted 2.56 & 2.73 8.2 Chevy gears. The low ratio carrier accepted 3.08, 3.36, 3.55, & 3.70 factory gears (also old Zoom gears, etc, for "performance"). The Chevy 8.2 10 bolts had the carrier split at 3.08. If this 10 bolt rear is original to the '65 Chevelle or Malibu that it was pulled from, it will be a c-clip axle 10 bolt Chevy 8.2 rearend not an early bolt-in axle Pontiac 8.2 or early Buick 8.2 10 bolt.
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