2valve timing question

[stangnutlx]

I put my short block together and did the timing chains, i lined everything up properly and the marks were just like the ford diagram showed. Is it safe to assume if the motor spins freely 5 or 6 revolutions that it is 100% correct?

 

[Modular2v]

I want to say that it takes 90 spins for the marks to line back up!

 

[patman0911]

If it's spinning freely, you're probably OK, at least as far as valves smacking pistons go.