The engine would still maintain operating temperature in the lower range but.....
The fuse may be your number one problem (30A), followed by melting your wire harness 'somewhere' if you try replacing a 30A fuse with a 50A fuse.
Wouldn't recommend it.
Would recommend fixing the original problem correctly.
Member of the Dropped Valve Seat Club.
Replaced #4 Piston, Rings, Rod+Bearings, AERA Re-Manufactured Cylinder Head and a light Hone. Then CLEANED the hell out of everything.