440 stroker kits advice and more....

Muscle is decent, but you still have to check things. I've used probably 10 440Source kits over the years that always had the same issues (or details I considered issues). I've only done 1 Muscle Motors kit and while I was impressed witht he finish quality of almost everything - the chamfered bearings were not chamfered enough and the assembly would bind with both rods on the throw. This was a 383 based kit too, and there was a long (months) wait with promises of pistons that were not shipped for a while. Minor things in the big picture but enough that I wouldn't say it's ready to go out of the box.