Just a word of caution. (well, more than one word)
A volt meter is superior to the amp meter when switching to alternator. Most modern alternators will provide much more AMP output than the old generator/regulator set-up. The wire in your harness will not carry the increased current without risking over heating. ALL of the current, except to the starter, passes through the wires to the AMP meter. If your battery is low, and you start pushing 40-50-60 amps back to your battery with your new alternator, you may easily damage your wire harness. Check the wire size running to your AMP meter, if it is #10, you are safe up to 30amps. Most tractors I have seen only have meters that read 20AMPs.
A volt meter will tell you much more about the health of your charging system. The volt meter does not use much current it can use the same wire your amp meter did but would only need much smaller wire. It just connects to the ignition side of the switch and to ground.
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Today's Featured Article - Tractor Profile: Allis-Chalmers WD45 (Gas Version) - by Staff. Beginning production in 1953, the WD45 had the same general look as the WD tractor which was produced earlier - but was much more powerful. This was due to the new 4-cylinder "Power Crater" gasoline engine with a 4 x 4-1/2 inch bore and stroke. Some people feel this was one of the most significant tractors offered by Allis-Chalmers in those days. Nothing in its weight or power class could match its performance. In 1954 they began offering the WD45 with the new "Snap-Coupler&quo
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