Weird live hand

[nutsinho]

5/5 500max at T-stone. SB/ villain is fairly good, experienced young player. We have been friendly with each other though so i don't think he's going to be making any serious non-standard plays against me. He views me as tight and very solid. LP is loose/fairly bad dude in his 30s.

The hand:
I limp 75ss behind a couple of limpers on the button. Lets say stacks of villains are about 600 and i cover. Pot is 25 or 30 to flop of:

9h 7c 5h


Checks to LP who bets 20, I raise to 60, SB thinks for a (actual) minute and cold calls. LP also calls.

Turn Kd. Checks to hero, what is our plan now and why? If you check, whats the plan for a totally blank river (offsuit 2,3, or 4)?