Serious 340 build into 361 HiRPM Screamer
On my son's Edelbrock LA heads, on a magnum block, we had to clearance the heads so that the stock magnum roller lifters could go in/ out. We checked this before assembling the motor, just in case he ever needs to change one.
We had milled .030 off of his block, so that may have affected it some.
It was minor clearancing. I actually took pictures, but I don't know if I ever posted them here. The laptop they were on crashed, so I no longer have them.
I have no idea if aftermarket hyd. rollers with the link bars will clear or not.
My Crane solid rollers clear by a mile.