Try to use nothing larger than a 37 amp "1wire" Delco alternator. A 61 or 72 amp"1 wire" alternator needs nearly twice as much rpm to self excite. Use as small a pulley on the alternator as you can find to run it as fast as possible. I find that it is much easier to adjust the alternator belt when I build the alternator bracket with slotted holes 2 inches long where it bolts to the engine. This allows moving the alternator up / down as well as sideways to tighten the belt. I also like the link type belts from a bearings and drives shop, that can be installed without removing the fan belt, plus the length can be adjusted so easily by just adding / removing links until it is right.
If Your "1 wire " alternator needs more RPM to excite than your comfortable with, nothing is lost, just buy a regulator plug and charge light to wire it up as a "stock 3 wire" alternator. The "1 wire" unit will work just fine when wired as a 3 wire and will excite at lower rpm, just like a normal 3 wire unit.
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Today's Featured Article - The Day Mom Drove the 8N - by Brian Browning. My Dad was wanting to put in a garden but couldn't operate the 8N and handle the old horse drawn plow he had found and rigged up to use with the tractor. Well, he decided to go get Mom out of the house and have her drive the tractor while he walked behind the plow. You got to understand that while my Mom is a hard worker who will always help whenever she can... she had never operated farm machinery before that day. Dad got her out there, explained how the clutch was the same as in our o
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