red line
I assumes the OP has the Clifford 268 mechanical cam, since he mentions 'doing the Clifford 6=8 package' in another thread. That shows as 268 advertised and 212 @.050" for the durations. Actual lift with standard 1.5 rockers is around .447". I dunno on LSA....
If you look at the Erson cams, then the RV10M shows the kind of specs you are thinking about, which is [email protected]" and 252 advertised, on a 111 LSA, and .435" lift. SSD mentions this as a Doug Dutra cam grind, which is a good pedigree IMHO. And with a desire to keep the RPM's lower at 70 MPH, then moving to a cam like this does make sense. The top RPM's will be lower so putting in a 3000 RPM stall makes no sense with a cam like the RV10M.
As said, the desire to keep RPM's down at 70 MPH cruising prevents a higher rear gear, and that drives the cam to have a smaller advertised duration to help the low RPM torque.
And I think then numbers thrown about for SCR and DCR are pretty close for the OP's combination: low 9's for SCR and high 7's for DCR with the RV10M cam installed at a 106 ICL. (It is hard to tell exactly on SCR since there are a few numbers upon which we have to make educated guesses.) The DCR would drop to mid 7's with the 268 cam at the same ICL so it is not all that bad IMHO. (That longish stroke helps keep the DCR from dropping as much as for a small block for the same duration increase.) That is like 5-6 psi of compression drop, so I am not so sure that the cam change would be very dramatic. But I would go with a Doug Dutra grind any day....