Which cam should I go with? Also which gear's should I run

[Plum crazy Bob]

hello everyone, my 73 340 cuda packs a nice punch but I'm yanking the automatic out of it this winter and putting in a 4 speed kit from brewers performance. I'm also doing some changes to the top end of the motor. The block is a 73 but it is built with 70 spec parts. I'm going with a set of edelbrock aluminum rpm heads, an air gap Intake, 650 double pumper hp series Holley and a set of tti headers going through an 2.5 x pipe tti exhaust. I need some knowledgeable advice on which hydraulic camshaft would be good for this setup. Also what is a good stop light light em up gear ratio that is streetable for a Saturday night cruiser? I was thinking maybe 3.91's. rear wheel is 15x8 on 270/60 tires. any advice would help