We have been running a Power Master 8060, 70 amp alt. in the Bird since 2006. No issues ever. Has no problem keeping up with the electric fan, electric water pump and electric fuel pump. This is a mini alt. which in our case we needed because we had to mount on the passengers side of the block to get clearance from the water pump. It may not align properly in the stock position. We got a special bracket and even then I had to shim here and there to make it line up. I am sure Power Master makes a similar unit in the original GM configuration.
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69 Bird w/1970 400 block(409 cubes), #64 heads, hyd. roller, Q-jet by Jeff E., original interior, ps, pdb, th350, and 3.73 gears. Pump gas, street driven muscle. 3800 lbs. race weight. Best, 11.39 @118, my son's car.
79 T/A w/463, Scat crank, Eagle rods, Icon pistons, Lunati solid roller, 262/270, KRE 325 heads, Northwind intake, QF950 carb, full interior, ps, pdb, th350, and 3.73 gears. Pump gas, 3650 lbs. race weight. 10.68 @ 126 so far... no tuning yet.
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