UPDATE, Took the restriction out, the washer tack welded to the gutted thermostat was probably closer to a 3/4 hole, anyway with nothing in there we headed down the road and there was no real change, we went a little farther traveling at 50-60mph and seen nearly 215 on the gauge.
Hot afternoon here though at 95 and with a new'ish engine I guess we are struggling.
Will try the 180 thermostat next .


1963 Plymouth Max Wedge
1971 Barracuda