just got through some reading on an interesting topic, regarding internal balance vs external balance. many a mentor of mine has always stated: " be careful pointing your fingers when looking for someone to blame, because when you do, there's three more pointing back at you!"
http://www.pacificp.com/forum/viewtopic.php?t=7903&postdays=0&postorder=asc&start=120
page 4 made me uneasy....
id like to think i have been pretty fortunate with my 383 build. i would also like to say that my "bird of prey" stroker crank has survived the torture i have put it through in the short time that i have run it with internally balanced balancer/flexplate on it. after some time with it, and some scientific testing i have performed on it, such as inserting a bashed in worn out "400" balancer on it for just long enough to surmise that the off-idle wobble riddle has been solved. while being the self proclaimed research analyst i think i have discovered this:
the broken internally balanced stroker cranks everybody bashes on the internet have one thing in common: the way they used to balance the front end of them. they were all drilled the same way! a circular hunk of metal is removed from the front crank throws on everyone i saw pictures of, all suffering identical stress risers from rotational forces combining with the 2-1 firing order on that throw...
considering i was disappointed for the longest time with this, i have just changed my tune! my engine builder is indeed an honorable man, he has tried to make this right with me regarding "three times' a charm" for a succesful flexplate installation. he has begrudgingly apologized for the mix-up that he had no control over(even though he won't come out and say it), and has agreed to send me a new blancer and flexplate to numb some of the pain of installing two transmissions because of a mix-up that he had absolutely no control over...so there really was an apology, i didn't hear it since the blood pressure rise must've caused my ear canals to be somewhat retricted.
i managed to get through to page 8 of a 9 page thread of the pasted information in this post.
suddenly, the tightness in my chest has receded, and am almost relieved now that i have an externally balanced crankshaft in my motor, that was sourced from approximately the same time period as the post i sat myself through. hopefully end of rant, i'll have a good sleep and begin tearing my build down with renewed vigor in the a.m.