Advice Needed - Can't Start Rebuilt 273

"wire tdc?" You mean poking a wire in the plug hole? This tells you exactly NOTHING.

Read through the link I posted above.

ASSUMING...................

the cam is ground correctly, installed correctly, and that the timing marks are correct, there are ...................

ONLY TWO ways to determine if you are on the compression stroke

1---If either/ both valve covers are off, bring the timing marks to TDC and look at the no1 or no6 rockers. If both no1 valves are closed, you are on the compression stroke. If both no6 valves are closed, you need to rotate one turn

2---You can bump the engine over while holding your finger in the no1 plug hole. As soon as you feel compression, watch the timing marks. As they come up towards TDC, that is the compression stroke.