Does anyone have any tips on how to install headers easier. I have a pair on newly rebuilt 557 engines with PSI blower motors having a difficult time. Any help would be good.

There is a laundry list of things that can make installing exhaust difficult, need more info

Find the two hardest bolts and START those first. Only start them a few turns. Then Start all the rest of the bolts. tighten all of the bolts a few turns at a time. If you tighten one or two all the way down it may cause a few to get pinched so that you can't turn them or get a wrench on them.
Mine are easy because I can sit down in front of my engines and reach in from the front of the engines.

need to know what type of drives etc..

Cut the hex head off of a long bolt of similiar thread size as header bolt. Thread into the fartherest header bolt holes. They will act as a guide and support as you get the inner bolts started. Remove the guides and install the last 2 bolts.

Hope this helps.

# 6 drives

Thanks for all advice I took the tail piece off and it slide right in. 557 CI with #6 drives.