Upgrade mechanical fan vs installing electric fan

I run the factory 2 core 26 inch rad with a declutching fan from a 70 swinger 340. No fan shroud.Stays at 190. 470 stroker. 655 hp 622 tq. Block is half filled with hard block. 36* Celsius is as hot as it usually gets here. Only quarter mile runs though. It will idle for a long time without getting hot. Kim