so it has a plated impeller- good
the larger shaft and bearings?
I'd inspect the bearings- pull the bearings and see who made them
btw blocking the bypass or a valve will increase flow or allow you to reduce hp
not for your car but did you see the thread on thermostats
may be at FBBO
Times have changed since the made in USA Robertshaw was best
IDK what folks do for 361- 413 t stats
stock passanger car will fry your motor
