When using these Barton Hemi Rockers and running pushrod oiling
Do you need any extra oiling to the rockers or is that enough?
Also would you bush the lifter bores on a aluminum block?

Call Barton and ask them about both

Which Barton setup are you using?The ones with the stand plate that bolts to the head has a spray bar the oils the rockers.

Push rod oiling is enough, provided the rockers you have are drilled for through oiling and have oiling adjusters in them. Test them ALL with an air hose when you know about where the adjuster will wind up with proper lash. The groove in the adjuster oils best at about two turns in from full out. Occasionally TD forgets to cut the groove behind the bearings that allow oil to pass though the body to the tip. That's why you should test them all.

If you have wide main, and rod clearance with a main priority oiling block the front lifter pairs left, and right will benefit from a very small slot cut in the tappets connecting the oil hole to the oil band. At idle, with a vacuum pump, they'll be no oil up there on those cylinders without it.

i never used any pushrod oiling just the spray bars on the T-D set up ive got the oil lines from the lifter oil galleys going to them and it still gets oil from the camshaft groove also mine is a street car so i like more oil to the valve train never had any issues the push rods and all the rocker gear looks like the day i installed it in 2003 !!!

I've got Barton's t&d rockers on my 572 Hemi bushed bores and tapped 1/8" NPt off the lifter galleys. Cast iron mega block. No problems with oiling.

I'm also only running spray bars. I also drive my car on the street.
Mega block bushed lifter bores.