The pistons have a little pop up, I don't know how many cc's. I don't know the casting numbers off hand, but when I had the heads off I took the number and used a BB book I have to find out the cc size. I calculated static compression very liberally (assumed a zero deck height, thinnest gasket available) and came up with less than 10:1.
The engine probably wasn't built properly for a cam that radical, I'm not even sure if it has rectangular ports.
It's basically pretty stock, so I think replacing that cam with a good street one will work out pretty well.
I'm just not sure how to combine the overlap with duration for best results.
Also, I know I can't use old lifters on a new cam, but can I use old pushrods?
I'd like to use hydraulic lifters for the ease of adjustment.