Dan (Florida)
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I've never had a chance to compare performance with another JH but in my experience, getting rid of the Strombergs for Webers / Dells , lightening the flywheel 3 pounds , and putting in a Jegs super coil (65000 volts) covers most of it. Of course careful attention to valve shimming and valve spring pressures have been preached to me for years. If you have the rope seal engine I suggest shimming the base of the seal groove as much as you can without binding the crankshaft. The seal you buy is just a tad bit undersized and may leak if not shimmed . Going back in after a leaking rear main seal is not a fun job. 32 chokes work fine, the biggest air cleaners you can fit, ( I use 6 / 6 shop vac filters) and lighter 175 width tires. hth Dan
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