Few random Q's about 318 and gauge wiring

splice. unhook your power. cut a 1 inch section of your wire insulator off leavin the 1 inch of copper exposed. do this to your wire with your gauges. i split my wires. so its actually 4. i splice the 2 pairs then twist them with my fingers as tight as possible and bend it around and cap it off with electric tape. it worked on my truck. it should work with your car. and ill sell you a 4 bbl intake for 50 bucks. just bolting on a 4 barrel intake and carb can boost u up to 50hp. and if you drive sensibly you can still stay around the same mpg