Really it would be neat to see someone stroke a 413, however with the low price you can get a 440 core block for, and the ease of availability of 440 based stroker kits, I think most guys will come to the conclusion it's easier to just go with the flow and pick up a 440 block. Plus like I said in my previous post, I can find a 440 block any time. Even if I tried, I would be hard-pressed to locate a 413. The one guy I know I could get one from would want much more $ than I can get a core 383/400/440 for. But you are right, doing a 413 properly with a nice set of custom pistons is not for the faint of heart or the average guy.
And yeah this thread is fun, keep it up!
IF your 413 block can be bored out to 4.25", I think stroking one of these wouldn't be a bad idea.
blueprint deck height is 10.72 or 10.725", depending on where you look....
take 1 4.15" stroke crank, aftermarket RB rods (6.76" long), and KB162 pistons (383 standard bore, 1.908" CH)
4.15/2+6.76+1.908= 10.743", or ~.020" out of the hole. with 92cc heads and a .040" head gasket it yields 10.3:1 compression. perfect if running OEM chambered heads
or look for thicker gaskets (fel-pro Z1039's are .051" thick, there's plenty of copper gaskets in the .06-.07" range on summit) and run closed chambered eddies. if deck height is 10.725", with the fel pro's you're looking at .033" quench (tight, but doable) and 10.7:1 compression with eddies..on summit, there's some .064" compressed rubber coated copper Flatout brand gaskets that would yield .041-.046" quench and 10.5:1 with eddie heads....
the other option is to use Federal Mogul Z366NP pistons, which are stock replacement 383 flat tops, 1.848 CH. (http://www.summitracing.com/parts/STL-366NP/?image=large) this would yield ~.037-.042" in the hole with a 4.15" crank, and .008-.013" out of the hole with a 4.25" stroke crank. these don't have valve reliefs, though, and are the same price as the Kieth Blacks.
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