Stock 7-Bolt DOHC Compression ratio

I have looked every where for the answer to these question so now its just time to ask.

I have sourced a 7bolt 1993 mighty max engine, and i have a built 6-bolt 4g63 dohc head.

My questions are if i put the dohc head on the stock 7-bolt bottom end what would the compression ratio be?

or

What is the volume of a 7-bolt 8 valve sohc head?

I figure if the guys with spyders can get away with a stock bottom end so can I. I just dont know if the 8 valve and 16 valve heads have different cc volumes.

What about valve reliefs on the stock mighty max pistons? will it clear the dohc valves?

Thanks in advance guys

Its been almost a year... Is there anyone on this forum?

Not many.

Might find help at these places:

1.

2.

3.

I've been all over the net, DSM truck and starion forums with no luck.
If anyone has a head from a efi mighty max that's not installed, that could mesure the dome volume that would be the only variable I don't have.

How many cc is the dome on the head of a 7 bolt head?