No cooling issues, zero. The rest of the cooling on the E body was a recored OE radiator, repopped fan shroud, MP viscous 5 blade fan and a 50/50 anti freeze mix.
The most power the engine received with this set up was a 360 @ 10.79-1, Edelbrock top end 1-3/4 header with a purple 292 Hyd cam set up. Backed by a 4spd and 4.10’s riding on 28 inch tires.
At one point I was driving this set up as a daily on a 40 mile commute one way (80 miles daily round trip) during NYC rush hour times into Queens on the clogged Hwy/pkwy. It was a 1 way, 1 hour (sometimes plus) commute.
The only thing that sucked was the competition clutch.