848 heads had the smallest combustion chambers available for a 235, resulting in a higher compression ratio which you can feel in the seat of your pants.
Putting an 848 head on a 261 will increase compression even higher than it did when they first put it on the 235.
Higher compression ratio does not come without a price. That price is heat.
If Chevrolet concluded that those extra coolant passages were necessary for a 261 without high compression, why would any sane person think that it would be okay to run a high compression head without the additional coolant passages?
The guy who suggested that it wouldn't be an issue probably did not know how small the 848 combustion chambers actually are.
Last edited by 52Carl; 01/13/2024 9:41 PM.
