Dude, me personally would just rebuild, start over from scratch. depends on budget/future plans with the car. If you are serious about an N/A build for eternity. then just worry about the bottom end, JDM TypeR pistons ITR idk but, like 11.9:1 compression, then get a good set of headers&intake, maybe a tune, being as the factory tune is for economy/ stock restricted intake&exhaust systems maybe $1200/ now if you have atleast $4500 to spend then shit gets good. For that price you have, Cheap ol, itr pistons, stock rods, ported head, valve job, springs/retainers, good header. Possibly Some Cams? regardless I would do what you can to rebuild the bottom and, if you can afford Head work the more "Power" to you. If your budget is decent then Sleeve the block 10.2:1 compression (boost build) setup. All Motor for now, down the road should handle fine with a small turbo setup for years. for around $6200 you could have a decent reliable 12seconds daily driver. If your going N/A tho...- do everything you can to have a GooD Port on the Head! it's extremely needed on N/A not as much boosted applications.