The 400 block is far less tolerant of screw ups compared to a 350 block. A bit of overheating and the 400 block has fits.
Power wise, the 377 or even a 353 (327 crank in 400 block) can work better in some situations. A 353 will be a proverbial chainsaw and work exceptionally well on try slicks with the high rpm power.
posted May 18, 2004 08:34 AM
I dont know out of the 2 which would be better. The 400 blocks are hard to find, and you cant really cut corners on the long stroke crank for the 383 and get it to live long and 6" rods are pretty much a requirement. The 377 you could prob get by with 5.7 rods if you wanted. If it is a true claimer I would actually prob look at a good 355 to be honest.
posted May 18, 2004 09:45 AM
If you mean the 4340 forged steel crank then yes it would hold up pretty well. Have it internal balanced and use 6" rods and the lighter the piston the better. Soemthing to think about would maybe be to use a flattop piston with Dart 49cc heads. With the long stroke and small head you would still end up close to 13:1 (i think) and you the flattops can be really light.
[This message has been edited by dirtbuster (edited May 18, 2004).]
posted May 18, 2004 08:40 PM
Good advice dirtbuster. I agree 100%.