Simon- I appreciate ANY ideas, really. At this point, I've resigned myself to pulling the engine this winter. So, I don't mind chasing any possibilities up until that point.
After I bought the engine, I removed the oil pan to verify it was a 383 stroker and see what the cylinders looked like, etc. I've attached the photos I took while the pan was off (sorry for the low quality). The number cast into the crank counterweight is hard to read. After a lot of research time online, I *believe* the crank is made by CAT (Cal Auto Transpeed). A lower quality, chinese import, that subsequently is out of business from what I can tell.
The guy I bought it from said PAR Racing in Spartanburg, SC assembled the engine for him. I'm waiting for a return phone call from them.
Yes, the flywheel I bought has removable weights. I've tried running without a weight and it was clearly not happy. I've also tried different amounts of weight trying to "sneak up" on the correct balance, but no luck.
As to the compression ratio, I used online calculators and the specs I was told to calculate the ratio. With that cam's overlap, the dynamic ratio estimate was about 9.5:1, with the static ratio about 10.5:1.
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