I know this has been done before but i can't seem to find the answer. I have a 85 Cutlass 442. I am installing a new Dart motor, similar as small block chevy. I need to figure out what i need for frame to/and motor mounts. I want to use the poly type good for my 530hp. My searching shows a 4 hole clamshell bracket to motor for a Monte Carlo [we all know they have the same G body frame] but the new motor is a 3 bolt triangle type mounting. Solid style mounts are everywhere but poly type don't seem to show up for this year car, will any of those others actually work? I would like to just buy new if available, there are kits that look right but all have different dimentions so? Or do i need to find an old 3 bolt clamshell, then what works with it on the frame? thanks all, john