When I started the engine, that point jumped to 14.5 volts and stayed there from idle to over 3000 rpm. With the engine off, the voltage to ground at the battery side of the starter solenoid measured about 12.5 volts. A 43.5" belt put the alternator just about in the middle of the adjustment slot. I ended up butchering my new generator to regulator wiring harness so I could keep the color code more or less the same. Since the generator voltage regulator was removed, I had to rewire the horn and main harness to the starter solenoid. Just one wire from the alternator to the battery side of the starter solenoid. I then bolted up the lower adjustment bolt and everything fit great. I ended up also having to use some shims (three flat washers) between the rear of the upper alternator mount and the block bracket boss. The slop in the block bracket mounting hole was enough to jiggle everything into place. I pulled it out and tried mounting the alternator to the upper front bracket with the block bracket loosely attached. I thought it was going to be too big which upset me greatly. When I tried to mount the alternator between the block and water pump brackets, it wouldn't fit. This is a very nicely made 1-piece, c-shaped bracket that provides the upper front mount and lower adjustment mount for the alternator. Then I bolted the front bracket to the water pump. This left a little slop in the bracket hole which actually came in handy when adjusting things later. No problem, I just cleaned and reused the original bolt. It appears to be made of 3/8" steel with a heavy threaded boss on the front. to bolt the rear bracket to the side of the block was too big in diameter (This bracket bolts to the side of the block where the generator bracket bolted and provides a threaded boss on the front of the block for the long alternator mounting bolt. The first thing that I noticed was that the bolt supplied by C.R.A.P. After removing all of the old generator brackets, I test fitted the new C.R.A.P. I had to remove the battery in order to provide enough room to pull out the old generator (dirty and very heavy) and to install the new alternator (shiny and very heavy). The installation was more or less straightforward with only a couple of minor glitches. ![]() ![]() You end up with basically a low mount alternator. The kit also doesn't care if you use a 64 or earlier water pump (with generator bracket dowel pin) or a 65 or later water pump (without dowel pin) as it doesn't use that particular hole. The kit is available in polished stainless steel, or powder coated black (what I used). These brackets allow you to use a FE that was drilled for generator mounting brackets, but not drilled for alternator mounting brackets. For brackets I used the custom generator to alternator conversion kit from Custom Replacement Auto Products (C.R.A.P.). I bought a chrome, 100 amp, 1-wire alternator from Summit Racing. ![]() This weekend I completed the generator to alternator conversion on my remanufactured 390.
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