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<div dir="auto">Hi again Jim. Years ago modified my TR4 to 60 amp (?) Standard Delco alternator. I MODIFIED THE ORIGINAL VOLTAGE REGULATOR BOX, Keeping the Box in place so it looks original.Can send you pics of the regulator changed inside. I did Document and shared with this list at the time. And a couple members made some comments. I also had a whole write up & pics on the web; but Comcast/ home.net didn't save my website when Comcast evolved ( no notifications) & all my jpegs were on floppy disks. </div><div dir="auto">Dating the Mod. Had to be @ 1998-2000.</div><div dir="auto"><br></div><div dir="auto">Now the GM alternator comes with a pulley that takes a thin belt. So I used & modified my original TR4 pulley to the shaft of the Delco alternator.</div><div dir="auto">Then I measured to find a belt that would work with the Alternator mounting brackets.</div><div dir="auto">I first found a farm tractor belt & had mm markings, but replaced with THIS NAPA BELT<font face="sans-serif"> 25-24379.</font></div><div dir="auto"><br></div><div dir="auto">I need to do some cleanup & repainting but I used a threaded rod with washers/nuts for the alternator pivot into the original TR block bracket on the bottom. For the top bracket I can't remember if it was the original TR generator bracket or one I sourced from an old GM Mercruiser 260 engine. But that's the easy part. The key was the pulley & belt mod as I wanted to keep the TR4 original size crank pulley & water pump pulley</div><div dir="auto">Sherman </div><div dir="auto">If you want more pics, you have my cell 410-302-3930 & email.</div><div dir="auto">Sherman </div><div dir="auto"><br></div><div dir="auto" id="composer_signature"><div dir="auto" style="font-size:85%;color:#575757">Sent via the Samsung Galaxy S10, an AT&T 5G Evolution capable smartphone</div></div><div dir="auto"><br></div></body></html>