Eckler's has rear mounts for a 55-57 Chevy car that bolt to any sbc V8 bell housing and then use the factory trans to frame mount cushions. They advertise it as Turbo 350 bell housing mounts but fits all V8's, and 63 and newer 4's and 6's. We modify the frame end of the mount brackets to fit whatever we are working on. The engine when mounted on all four corners is very stable but those front mounts often have to be notched for a bigger balancer or p/s brackets. Side mounts are best IMO but if you must have idiots (headers) then the four corner mounts leave the sides of the engine wide open.
