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Just got done mic'n my 84 Windsor block. It's definitely 0.040" over... most of the hole are at 4.0405 to 4.0413 and one a little tight at 4.0395. Just wondering if that's an issue. Can't find specs of max cylinder to piston clearance... Probably just looking in the wrong places. I want to go 393 or 408 stroker for my 66 F250. TIA.

 

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My intent is to go forged.

 

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LSG, don't have any of the rotating assembly yet. Shopping different kits at the moment. Since I'm not looking for anything past 450hp and gobs of torque (it is a 5000lb truck after all) I'm limiting myself to a cast crank, longer rod combo. I have a set of redone TFS High Ports to go up top, Edlebrock RPM, & link bar lifters for roller cam (still need to pick one). Biggest issue I'm running into now is finding a machine shop around me to go through the block, do balancing or just check stuff out.... They're dropping like flies and the few that are left are looking for exorbitant money for minor work. Took a finished 289 in four can bearings and they wanted $300 plus I had to wait 4/6 weeks.

 

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Woodchuck, that's the info I was going for. When I mic'd the cylinders I checked in 3 locations at three different angles (9 readings total) and all are consistent with no taper. They just vary cylinder to cylinder. I know it was a rebuilt engine from Jasper put in a few years back. Still has the warranty stamping numbers and overheating tag on it. It came out of my uncle's old van and barely did 10K since installed.