I'm sure any shop could work on one. Doing the job correctly is a whole nuther story...........or Shops in your area have the proper tooling.
wouldnt the final bore of a piston that measures .058 be .060 so there would be .002 clearance?? so them being stamped .058 is what they truly (with in reason) measured, generally a 4" piston that is marked .030 actaully measure 4.028 +/-.0001 ?? JEFF
i usually measure all the pistons to make sure they are ll the same, and if there are any iregularities i do the final hone to match, but its seem lile piston manufacturing is pretty damn good now a days. JEFF
I my case they were -.0015" to -.005". What you are saying would make sense though...... My new slugs I've been told will be +/-.0005 from the +.060" dimension. I'll let you all know when they arrive.
The old pistons were Jahns and were at made in the early 70s. which could explain some of the quality variable.
Most piston manufacturers make pistons that fit the oversize bore designated on the box. Thus a .060 over piston will fit a bore thats .060 over standard bore. So.............the piston itself will be a size smaller than that to compensate for expansion. Any variation will take into account the type of piston, cast or forged, as each will expand at a different rate. Frank
exactly, thats all i was trying to say, if you get .060 pistons for a 348 and they are hyperutectic they should actually measure 4.183, or very close to that, that would put .002 of clearance. final bore would be 4.185. JEFF
Well, they use the same rod bearings. Can you make the crank fit? Yea, but it doesn't just drop in. You have to turn the main journals and the nose of the crank (maybe recut the keyway for the balancer?). You can use big block rods, if you buy the pistons to make them fit. It's not exactly a bolt together deal. Larry T
OK, I have a line on a 409 Crank, 409 Single 4 BBL Aluminum intake, maybe that would make a great stroker? I also have to look at a set of 425Hp heads, one got hit when a valve dropped, but today there are some pretty good shops at saving these castings.
The Jalopy Journal
