Erson makes good cams. I have their Hi Flow1H (Pn E210421) .502 lift 228@.050 duration cam in my Mustang II fastback and it runs out really nice. Probably too much for your app, but a nice cam nonetheless.

I've also ran that Crower Baja Beast cam in a '69 Mustang I had. The mustang had 2.79 rear gears with an automatic and with 4 people in the car it'd still fry the 235/60-14s like no ones business. Nothing fancy about the engine, not even headers, just a .060 overbore 9:1 302 with a factory 4bbl intake, autolite carb, stock heads.

Tech inspector's got a good cam too, although I think you could go a step higher. I'd try and run the XE262 (35-238-3) cam through the computer and see what numbers it puts out.