Crane CCH-312-2-NC

I finally pulled my cam out to see what it is, it's an old Crane CCH-312-2-NC. It's a single bolt cam that I can't find any specs on it, but I have found the specs for the 3 bolt version, which I will guess are the same, since I measure the duration and lift and it matched.

My question is, this cam is a 3,200 - 7,000 rpm cam that likes a 3500 stall converter and a cruise rpm of 4200+. I have since switched to a 4 speed, and am looking to regear to something a little taller to lower my highway RPMs, but I am wondering if I will have issues with driveability. I currently have an M1 single plane, but plan to go to a RPM Performer to help a little on the bottom end.

I am currently about 3650rpm @ 70 with a 26" tire and 3.91s, but I am looking to go to a 28" tire and either 3.73 or 3.55s to bring my RPM down to about 3k at 70.

Am I going to have any driveability issues with the lower rpm, or give up a bunch of power?

Here is the cam specs..

Crane Cams 684571 Crane Hydraulic Flat Tappet Camshafts | Summit Racing