no bolts is that bad
 

i bought a 13bt bridgeport bare block. i just got told i may have a problem. when i got it it came with no main pulley and main bolt or flywheel and flywheel bolt. i was told i may have put the end float outa whack and something about a needle bearing falling apart. i bought the front bolt so i could turn the engine but havent got the flywheel bolt. do i need it for turning and keeping everything all fine n dandy. also do i need to now pull the front cover off and sort something out? im gonna give kiwi re a call tomorrow and see whats what but to put my mind at ease or stress me more, any answers you have would be appreciated

If the front ecentric bolt was gone when you got the engine, then yes, you will need to remove the front cover and set the endplay again. What happens when the ecentric bolt is removed and not replaced using the correct procedure is that the torrington bearing will drop and endplay is not valid.

so i need to do this before i turn it to keep it free and lubed.do i need the flywheel bolt in place

yes. the front pulley bolt keeps everything in place and end play in check.

no.