Which chevy thermostat? Old small block chevy 350? If the stock thermostat on a MEP-802a is a 170 degree, then maybe a 180 deg. F would be worth trying, depending on your operating environment.
If you guys really want to "experiment" with raising the operating temp of the coolant, and do it on the cheap, then all you need is duct tape(green or tan), and a sheet of cardboard or similar material. Block off the exit side of the radiator, on top of the MEP, start with 25% reduction and then move up. YMMV. A good IR thermal gun will be helpful, and record your ambient temp while experimenting.