I'm working on a project 239 and was wondering if it could possibly be safely bored out to a standard 256 bore size of 3.625?

I don't personally have a sonic tester yet, and seems to me like none of the other machine shops in the area do either.

Mine wasn't sonic checked. We went +.125 been running it for 10 years now.

  Dennis in Lititz PA

So it's not Leeking?

Frank/Rebop

Bristol, In ( by Elkhart) 

Frank,

Dennis IS a plumber. Plumbers don't have leaks!

NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

I know, his sign on the truck says "Leeking Plumbing" His last name is Leeking!

Frank/Rebop

Bristol, In ( by Elkhart) 

Thanks for the reply, it's actually going to come out at approx. 283 cubic inches as I'm putting a 312 crank and rods into it.

Hi Frank,

I'd spell my last name that way, too, if I had a plumbing business.

NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York

What heads are you going to use? Is it an early or late 239?

  Dennis in Lititz PA

Come on Frank give Dennis a break. Most of us are at the age where we are more likely to have leaky plumbing than the car. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

I'm guessing you know you'll need to use 272 pistons with that and cut back the skirt.

  Dennis in Lititz PA