From what I understand the block was highly modified including changing the lifter angles.
Didn't Landy try that without much success?
Yes, there was a magazine article that Dandy Dick moved the lifter valley around. It was in an old SS?DI.
Sox and Martin also had a sb mopar PS...
That's correct, Landy did it first, only with success. The article was in a SS/DI, I still have that issue packed away. Best drag race car mag ever, hated it when they closed it down.