Setting up the Power Steering, alternator and AC compressor. I had an extra 455 in the shop with original brackets but wanted to switch the Alt. over to the left side. I used the original PS bracket and pump from the 455. The PS bracket bolted to a cast aluminum bracket that must have held the smog pump originally or maybe a vacuum canister. The original brackets left the PS pump and AC comp. to far out. They wouldn't fit inside the stock inner fender panels. So, I cut a square hole in the left fender panel. I will make a blister with enough extra space to accommodate the PS pump and attach it to the inner panel between it and the tire. The PS pump sits under the Aluminum bracket and I will come back to it in a minute. You can see in the above picture where the pulleys on the crank and water pump are. Since the PS pump is going to mount in its original position I ordered a stock belt that comes from the inner most small pulley on the crank to the pump. That left me the outer two big pulleys on the crank that line up with the inner two large WP pulleys to drive the alt. and the compressor. Now if you look back at the 1st picture you can see the unaltered aluminum bracket with the ears on each end that I wanted to use to mount the alt. over the PS pump. I had to try about a 1/2 dozen belts to find one that was the exact length I needed. I can furnish the NAPA numbers on the belts if anyone is interested. Since the distance between the ears on the aluminum bracket was greater than the stock larger mounting ear on the 90 amp GM alt., I started out by using some different spacers to get the alt. pulley to line up with the back larger pulleys on the crank and WP. Then I discovered that the head of the bolt that went through all the tabs and that the alt. pivots on was in the way of the drive belt. So, I pulled out one of the spacers so I could line up the alt. pulley with the crank and WP. It meant that I had to move the front ear on the cast aluminum bracket back about 3/4 of an inch. I didn't trust myself to weld the cast aluminum so I took it to a local shop. You can see the result here and in the second picture. With the alt. and PS now installed and in line I moved to the other side and mocked up the compressor location using the original right side alt. bracket. Once I had the belt lined up, again using spacers to take up the gaps on the mount, I pulled the bracket off and cut away any thing that didn't affect the strength of the bracket and that would allow side to side movement in the compressor so that I could tighten the belt. The next step is to make a spreader bar to go from the alt. to the compressor to put tension on the belts.