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I have a 340 bored .030 40 years ago as well as a set of ForgedTrue I believe 12.0 to 1 pistons that are that old and new as well. Just looking to put it together finally as just an occasional play toy. I have a set of X heads & a set of J heads, Years ago I tried to port the X heads & ground...

#4 main bearing cap just slides into the block & actually you can hold the 2 sides of the cap & slightly twist it just a very small bit. The other 4 caps you have to lightly tap them into the block. Is this #4 cap OK?

Looking to get a block square decked & other work done I have no idea of a good quality shop in or around the Denver area. Thanks for the advice!

I tried looking around on here and the internet and could not find much information on a guestimate as to what a pair of these brand new bare heads in their boxes are worth? P3870812 W-2 heads. Thanks for any input!

I have a new set still in the box of ForgedTrue Pistons for a 340. I believe the number on the box is 1633. They are domed, 1.800 C-H, for a 4.060 bore. They weigh in @ 524 grams. Anybody have an old catalog on what the compression would be with these on stock 340X heads? Is 524...

A guy gave me a 1970 340 block. It's already .030" over and I wasn't sure how far out one can be bored and still be reliable for street/strip use? Thank You!

I bought a old 77 p/up with a factory 440, thermoquad. Was a plow truck for the neighbor and rarely run. I'm having trouble figuring it out: idles fine, starts OK, new fuel pump and it checks out good with both flow and pressure. You nail it and it revs just so high and starts spitting and...