Hi Guys, relatively new Conquest owner, picked up a stock 87 with 106k back in October and have spent most of the winter and spring getting it back in shape after sitting for 15 years with a bad head gasket. I've made a lot of progress: completely new steering (including redhead box) and front suspension, new clutch, rebuilt the rear axles, new CIFIC head with stainless valves from Dad, new cam and head gasket, all new fuel pump/cleaned tank/filters, rebuilt throttle body, new hoses/lines/belts throughout, rebuilt the calipers, new brakes, new front bearings, etc etc etc. Basically I've been getting it ready to do a handful track days this summer.
As of last week put about 100 miles on it, and was starting to hear some chattering and front engine rattle at idle; I tightened up the balance shaft tension which took away most of the noise, but thought i was still hearing a little bit of chatter under mild load (e.g. 5lbs of boost or less). I attributed it to noisy mechanical lifters (valve lash is .006 and .008 respectively), however took her out today and started hearing what I believe is some pretty loud rod knock at 1500-2000 under zero load. I pulled over, and saw the oil pressure gauge was right above the L peg. I killed the engine waited a bit, checked oil level (fine), and on 2nd or 3rd restart had middle gauge oil pressure again. I had replaced the sender about 2 months ago as the original was dead. Before I replaced it I hooked up a mechanical gauge and had 80psi on cold start, so never though I had an issue with oil pressure. The car even got a new OEM mitsubishi pickup o-ring when i previously dropped and baffled the pan.
All that being said, while I'm hoping that i just have an immense amount of chain slop (and just need to pull front cover and replace it all), or somehow have a really loud rocker, and that the oil pressure drop on the gauge was a fluke, I'm a realist and think i need to rebuild the bottom end.
I've already read Dad's rebuild advice thread a couple times, and I assume I can get away with just a short block rebuild since the head is brand new. That being said, does anyone have any recommendation for a trustworthy machine shop in the Northern Illinois/Northwest Indiana/Southern Wisconsin area with a good track record in this community?