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.003 to .008 backlash is what you want to achieve. Frank

That plug is directly over the piston, it is used to verify top dead center. Number 6 and number one reach tdc at the same time. If you put a rod in the hole and use a dial indicater to measure the highest point the timing mark on the crankshaft pulley should be at top dead center. Frank

Clutch disk is probably stuck to the flywheel from sitting. Pull the clutch pan and use a putty knife to free the disk from the flywheel. Have the clutch pedal depressed when you do this. Frank

Most seals have coating on the outside diameter, so no lubricant required. Frank

Comes with two wenches, although they seem to be very obese.

PC- 7 works well for repairing steering wheels. Frank

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Yikes!!! Go back to square one and rewire that mess. Frank

There are a pair of rebuilt 4.89 gears on the G503 forum right now. https://forums.g503.com/viewtopic.php?f=56&t=320219 t

You could also try Bob Stahl at Veteran Vehicles, https://www.veteranvehicles.com/, he specializes in gear swaps, rebuilding, and parts. Frank

Installing 4.89 gears would be the easiest route. Everything would fit and you would get the mph you want. Frank

Get the head resurfaced, .022 isn't that much. Frank

As stated above, check the compression. Frank

GL 4 is what I have used, although GL5 could be used also. As I recall the syncros in the NP420 are aluminum not brass.

I use 85w-90 gear oil. Frank

I believe they are construction holes used to position the sheet metal while forming. Nothing goes in the holes. Frank

As stated above I think the accelerater piston is not working properly, worn throttle body or bad seal. Frank

I love it!!!!!!!!!!!!

Nice website, good information. Frank