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T/S 368E
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I just did the same thing. Bought the cheap little screw in locater.
Engine is running also, but I wanted to get exact timing before hitting the fogger & accurate records.

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I bought a non fouler adapter, threaded with a 3/8" - 16 tap and then got a ling 3/8" - 16 bolt and ran a die on it to lengthed the thread and use that for a dead stop on a complete engine.

Turn the engine over slowly until it stops, mark the balancer, turn the engine over in the opposite direction until it stops and make a mark. 1/2 way between thse marks is TDC
 

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I just switched over to a crank trigger setup from a stock distributor and stock timing pointer. I used one of the screw in the spark plug hole top dead center locaters. It worked out real well and actually matched up perfect with the stock timing indicator.
 

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I've made these locators from old spark plugs, by breaking the porcelain out, the electrode off and running a tap for a bolt through it. I then use a long bolt and nut, the nut is a "lock", and use that to find TDC.

I usually round off the end of the bolt as well, so the piston isn't making any contact with any sharp threads.
 

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I've made these locators from old spark plugs, by breaking the porcelain out, the electrode off and running a tap for a bolt through it. I then use a long bolt and nut, the nut is a "lock", and use that to find TDC.

I usually round off the end of the bolt as well, so the piston isn't making any contact with any sharp threads.
X2. This worked real well for me!
 

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I've made these locators from old spark plugs, by breaking the porcelain out, the electrode off and running a tap for a bolt through it. I then use a long bolt and nut, the nut is a "lock", and use that to find TDC.

I usually round off the end of the bolt as well, so the piston isn't making any contact with any sharp threads.
this is exactly what we do....lol
 
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