Overheating 360 new engine

1984 Dodge Shelby Charger 2.2, 10.0:1 CR factory. Ran on regular but premium recommend. Shelby milled the stock blocks 0.030".

I bored it 1mm over with taller pistons for a measured 11.2:1 CR and it ran on pump 91 octane. Compression test was 215 PSI in all 4. Starter pulled a bit slow.

But the same exact build on a 1984 Dodge Rampage 2.2 and it knocked on 91 octane.

Both were 525 5 speeds FWD

Oh, both cars used a factory 2 blade electric fan on a small cross flow radiator.