Don't paint the frame until all your suspension and everything else is done. for the A frame, measure the length of your car, then the width, then how high it is ( body only ), then make your vertical beams long enough so the body can be suspended about 3 feet. Make your support legs as long as the car and the crossover beam about 2' wider than the car, weld and gusset everything. What I mean by support legs are the supports that run paralell to the car to make it so it's not tipsey, the crossover goes overtop the car. Gusset every weld and weld square.