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Turns out the IAC needed adjusting. Part of my problem (in my shop) is having too many parts laying around. This GL10 was a rebuild from the ground up and I had parts from my RX laying around also. Which means multiple IAC's to choose from (and not keeping stuff separated). So I grabbed the best looking one and cleaned it, then installed it on the GL. Only messed with it once, after getting the engine running, but knew too much fiddling is a bad idea. I got the car back to my shop last week and after going thru everything (again), I tried a little adjustment on the IAC. It worked like a charm, no more surging and fuel dump is almost gone. No more smoke after startup. It went home last night and the owner took it to work. He txt'd me and said it stumbles, shakes and farts at first, then runs better when its warmed up. I have the 2 10in fans on a switch now, the engine struggles to get to Op Temp but manages after several miles. Big reason is the radiator is a BIG 2 row aluminum rad (In prep for NA/T), so we may find a smaller rad to run temporarily. Now he needs to find another 5spd D/R trans as the current one is almost gone