Thread: carb and rear question

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You won't be able to feel the difference in the seat of your pants with the spacer in or out. It simply doesn't make that much difference. A spacer can keep the carb - and therefore the fuel mixture cooler, so I'd leave it in place. If you want to remove it, simply unbolt the carb, lift it up, and take out the spacer. You may need some shorter studs to put the carb back on, though, and you'll need a new carb gasket. Like I said, I don't think it's worth the effort.

Concerning the rear end, unless you have a real stump-puller of the motor, you don't need to switch to a 12 bolt. A gear change in your 10-bolt will do fine. I wouldn't recommend a 4.11, though. It will give the car a real kick in the pants, but if you have to go on the highway, your engine will be operating at a lot of RPMs. You'd probably be turning around 3500 at 65. That's hard on the motor, and uses a lot of $3.00 gas. Something in the 3.55 range would provide a lot of kick over a 2.82, and would be more reasonable at speed - around 2800. Changing the ring and pinion is a lot cheaper than replaceing the whole rear axle.