Thanks for all your replies. Sorry for the untimely response as i was on the road and not really able to spend much time on the phone. Anyway to my knowledge based on marking, it shows this rod to be mfg'd April of 1968 and would throw a 6/7 level line. Here are some pics as it seems to be in great shape with little use
The FY-A710 was introduced in 1967.
Your April 1968 rod in the April 1968 Shakespeare catalog is described as a "Presidential Gold Cup Series rod."
7'9" 4.7 ounces "Omni taper" ("Bigger diameter butt section with progressive tapering blade gives unusual power to handle bigger fish, yet there's action enough to cast light flies/lures").
It was rated for an AFTMA 8wt line in the 1968 catalog but in 1967 at the same 4.7 ounce weight and Omni action, it was rated for C, D, HDH, HCH lines.
The AFTMA equivalent for that rod would be a level 6 (D), Level 7 (C), DT6 (HDH) or DT7 (HCH).
FWIW - The 1968 "Light Action Taper" FY-A310 7'9" version of the Presidential Gold Cup Series weighed 4.0 ounces and was rated for an AFTMA 6wt line while the FY-A510 7'9" "Light Kwik Taper" was 4.5 ounces and rated for an AFTMA 7wt line.
In 1968 Presidential Gold Cup Series rods came in a "plastic bag" and a "rubber capped fiber case" (I don't know if "fiber" is cardboard or some kind of plastic).
It cost $27.50 in 1968 and $27.00 in 1967.
Hope this helps.
Enjoy your new rod!!