I am alittle disappointed this is turning into a debate.

I having to say over again.................

Our approach has been to learn from folks that have a larger R&D ability than our own.
It has been that when you fix a design flaw,you just fix it.

We found the stock 4.3 has rods or pistons are offset to the bore.That depends on how you set that.

We found that doing research on what is different between the 4.3 and the 5.7's.

We found the split cranks are a weak link in the engine design.

All this was confirmed when(I HATE calling out names when having done that been there myself should be enough to just pass along the info),we bought a Bowtie cast block,common pin forged crank,aluminum 210 heads at auction st the Indy drag racers auction from NASCAR Henrick Motor sports.

What that does is provide a stroker set-up that cures the side load issues being the rods on a stock crank is offset to the stock crank in it's design.

For yrs a local machine that I am close to has told me about re-bores in bores that are oval because of that offset.

Now I wouldn't be doing my part on this forum if I didn't report what we know.

Are there stock parts that can be used??.Sure,I guess there are.I think the key here is to know as much as you can if that is the route you decided to take.Make no mistake about it,GM never intended the 4.3's to be a performance engine short of the turbo version they built.Just to say that the 4.3's are just a 350 with two cylinders cut out of it,well there is more to that to know and learn from.That is the myth I see all too often.That is just not true.

If your serious about a 4.3,I suggest you do a hard look at the link I left for this thread.Also,the marine parts are a good source for mods.LOL-as long as you don't hook up with a reverse rotation cam.