should i do a main support??

[Pure Stock]

had issues with my last head bolt, so i am pulling the motor out to get it off. and going to install cam that way too, will make it easier. while i have the motor out, should i do a main support and windage tray while i am at it?

will the main support be a big help in keeping my block together nearing the 500whp mark?

Windage trays are nice. The main support is not designed to keep the block together. They are designed to help prevent main cap walk. The block can still split from the lifter valley to the timing cover area even with the main support installed. At best, it's a band-aid.