Here is another angle...
By the time you go through the cost of building an engine, for equal or less money you can buy a low mileage 4200 complete with harness etc. If get one out of a 2wd trailblazer get the transmission also (4sp OD), mechanically the only kink is the oil pan - its mid front sump. There are enough people around now that know how to remove the un-needed anti-theft/body control computer stuff from the stock GM PCM. Mounts are quite simular to an LS series engine.
If this engine can haul around a TB - it'll do just fine on a '57.
The down side is it will take longer than a 292 swap as there is more fabrication to be done - but you'll get 2x the gas mileage out of the 4200 than the 292. I know this first hand. Stock the '06 up 4200's are 290 HP... it takes a highly modified 292 to get to that level, and then they are raunchy - big cam etc. not so driveable.
Last edited by efi-diy; 02/26/10 02:21 PM.
