[Supras] Oil pumps and other questions

[Fred]

I finally got my pistons from wiseco, they have been on backorder since mid feb. The machine work should be done by the 16th, hopefully.
I went with forged wisecos because they were the same price as stock pistons only better, hopefully. 
So, as I move closer to putting this engine back together I am wondering about oil pumps. Is a new stock oil pump adequate? or should I look for something else. What is the general consensus of the group? I read somewhere in a forum that a guy was recommending a 5m pump for more pressure, it was not in this group, and I can't seem to find it again but has anybody heard of this? There was also mention of machining the plate at the bottom of the pump if worn and shimming the pressure control spring for more pressure. A new pump seems to make more sense to me. What do you guys think? Toyota, aisin pump, 7m pump, 5m pump, remain or new or other suggestions.

Also what do most people torque the head stud to? 2.2mm cometic gasket with ARP studs, cometic says no retorque is necessary, do you agree?

Thanks
Fred