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Fuel pressure reading is low

Crankcase pressure valve to pressurize oil tank needs replaced

Yep....

Thems old top hat heads...if you took .015 off cc's only increased by maybe 2cc . Trash stablizer,set at 22° at WOT cranking and set idle where motor is happy close to 2°

What's the cylinders look like as classic sign of it being hot numerus times

1972 to 1976 powerheads will swap out

Highly doubt it do to gear design and bearings used

Here...Its a cooling mod as all these year motors have this problem

Swap the trigger wires around ,if that terminal still doesnt fire then replace switchbox...

Needs the water mods done to keep piston ring pin from migrating.

look it the bottom of cylinder..

I use a BFH to adjust a lot of things o_O

Its under the powerpack...

This... https://www.ebay.co.uk/p/1850881452

Check starter and battery as if cranking slow it wont fire

Check your cranking voltage first...a dragging starter or weak battery will cause no fire problem as engine has to turn 300RPM or more to generate spark.

If in my shop this is what I would do: 1) Disconnect rectifier/reg 2) Disconnect VRO harness 3) Check pins again for voltage There is nothing in that wiring that will keep ignition system from working.

Flywheel and stator if damaged and a looot of cleaning as magnet debris get slung around.

If there is any short on the purple wire it should blow the fuse on engine. I would disconnect rectifier/reg at engine and retest.

Check the gear oil...