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Originally Posted by Jac Mac
6.58 rod is wider at big end & must be narrowed to fit 351w crank, tunnel dia is same & clevo 351 brgs fit straight in. Rod bolts for 6.58 rod are approx 0.200" longer than 351c.
Built a couple of 400 cu in strokers in 351w blocks using these rods & 400m crank plus a 0.900" pin height pistons & reduced base circle cams---- lot of work.
351w crank with 6.58 rod & 1.165 pin height piston from 331 stroker would be a nice unit... piston pin bushes from 272/292/312 'Y' block press straight into 6.58 rod small end & suit std 351 wrist pin.
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Thanks for the info. I have a 69, 351-W torn down in the shop and the 351M egines should be here in a week or two, once I get one apart, I can get the big widths of the rods and get to work on the 351M rods and get them to size, machine work is basically free if I do it, have access to a shop on weekends for my personal use...
"Back when", using the 400 crank in the 351-W block was the only game in town for strokers and a lot of machine work to the crank was needed, now with all the after market stuff, the 351M/400 engines are pretty much worthless to the average Joe.
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David have you checked Speed-o-motive? I know they offer a long rod kit and you may be able to get which piston is used from there. They typically list what components are being used. I have on of their catalogs somewhere and now that the weekend is here I'll try an locate it.
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I checked on their kit on-line, they don't give the "specs" or piston part number, just the rotating assy. If you have a catalog with the piston type/part number, that would be a great help, that's the only thing "missing" right now, I'd be forever grateful and in your debt....
David