13:1 Compression Pistons in 340 Small Block

Thanks for the feed back!

I would definitely like to be able to drive this on the street but also have something I’m not scared to talk down the the strip and roast the tires with. This engine is going into a 340 Dart but the block is non numbers matching (if I was numbers matching I would rebuild it to stick specs) I’m not scared to spend some cash on cams and run Some high octane fuel and I don’t care for fuel economy but I’d like to get better then 8mpg. It’s an automatic car and I haven’t looked into torque converters or anything along those lines. I have a 727 trans I was going to use with this application if that helps at all.


I have been writing a series of how to articles on building a small block... I am not finished with all of them yet, but you may want to use them as a reference...

Here's a link to the main page for the How-To articles:

How To Articles | For A Bodies Only Mopar Forum


Here are the links to the ones for rebuilding a small block that I have done so far, I may be able to do one more this weekend on how to install the pistons....

How to Rebuild a Small Block Part 1: Block Prep

How to Rebuild a Small Block Part 2: Cam Bearing Install

How to Rebuild a Small Block Part 3: Install Water Jacket and Oil Galley Plugs

How to Rebuild a Small Block Part 4: Pre Flight Inspection After Machine Shop Before Assembly

How to Rebuild a Small Block Part 5: Crankshaft Install