4.250 crank factory 340 block

Marcohotrod said
why go 4.25" ? too much extra friction after the exhaust valves open, revs like a pig. when car craft built 6 similar engines, the 440,460,454, and the 3 455's, the 440 had the most torque and tied for most horsepower with the shortest stroke and least cubes.

LOL, great joke. I take it when you built your 4.25 stroker you took measures to fix the issues?

72Dart360 said
Is there any extra stress on the block using a longer stroke?

Yes, but it is the amount your introducing in the form of extra torque and HP of the build. You could build a very mild (AKA Turd) 350HP 4.25 stroker with minimal stress.

6pkScamp said
The stock caps were not strong enough to keep the crank secure. I personally didn't know what was going on but when pulled the caps I knew there was something not right with the wear on the bearings. I took it to a machinist that's a Loves his mopars. The motor only had 1000 miles on it.

Doesn't Program make caps for small block MoPars?