Bret-
Kind of embarrassing typing this since I'm asking for input and I'm causing the confusion since I can't read part specs.
The crank is in fact the Ohio 4.21" stroke with 3" mains. I checked the part on the living room floor.
I just read the wrong description yesterday when reading the website yesterday.
I had the same concern with those springs yesterday after reading through a bunch of the threads I found here on the site. Funny thing is though, they aren't too far off what Comp Cams calls for with their HR cams. I'd rather worry about getting the right cam though rather since I do have another motor these springs will work in, so I won't be "out" anything if I end up buying another set of springs.
Again, thank you for the input.
Johnny,
This is a 557 block. From what I've been reading though, it would take a good amount more power than I'll be making to split it. As you said, you've been racing yours with out incident for some time and I know of a few others that are making similar horsepower to my goal and have been for years.
I do also have my W72 'XX' block that is numbers matching for the car, but I was planning on tucking that one away in case I ever wanted to do a factory correct build. Thoughts?
Thanks again
-Sean