I just got my block ('57 292) back from the machine shop and will start to slowly put it back together. I know there are many mods that people do to the Y block most had to do with the oiling system, so I would like to get a plan on what to do with my motor and have it all in one place. so everyone feel free to chime in on their thoughts on any or all of the following.

1. should I close off the drain tubes on the rockers?
2. if I do block off the drain tubes, should I drill the small hole in the block at the cam plate?
3. I think I have heard about a "better" cam bearing that I should buy, what brand is that? The harder bearing that will not let the groove close up. and what about cutting a groove under the bearing, in the block itself?
4. I have a book that shows drilling holes close to the tappet bores in the valley to let oil drain down to the cam, should I do that? if so, won't that reduce the amount of oil draining down to the timing chain and dist gear?
5. steam holes, I think some have said not to do this as it may cause cracks in head or block but I'll be running this with a stock Model A radiator. the 292 in the car now has the steam holes drilled and stays cool. thoughts? Radiator fill is well above the motor.
6. how important is it to have the posted heads? I have a set of each but the posted set will need more work and you know these motors are not cheap. Both sets are uncut and I'm running stock pistons. both sets are the big valve heads.
7. Camshaft, should I cut the oil groove deeper? I have a lathe and this would be easy to do. I will be buying an aftermarket cam, while we are here, any suggestions?
8. any other things that I have not heard of?

Thanks for your thoughts and yes, I know most of this has been covered before I just thought it would be nice to get it all in one place