1989 360 Factory Roller lifter question

I put together a 89-90 360 roller motor and planned on using the Comp retro hydraulic rollers... until we found out the block needed to be ground and clearanced for the bars... DOH!!! Not quite the drop in comp told us. LOL

Didn't want to pull the shortblock down, we put the stock rollers in it. Cam lift with the Jesel 1.7's is in the .640 range, IIRC. Should be interesting to see how things hold together. the rest of the parts are what I believe are top quality, beehives, smith bros, etc. The lifters are the only area that even concerns me.