One of the clubs I belong to sponsored a cruise this last weekend (8/16/2020) to escape the heat expected at home (100+ degrees). So a cruise out to the SWW ocean coast was planned, with expected temps there predicted to being in the mid 60s. The weather man was wrong, it was the mid 70s but still, much cooler. Us 'wetsiders' just aren't acclimated for heat much above about 80... LOL. And very few own cars equipped with AC. But it seems lots of other people had the same idea... we hit a 5+ miles bumper-to-bumper back-up getting into/through Aberdeen Washington with temps in the 90 degree range. This is where it gets interesting... So as our long line of 'special interest' cars was creeping though this, cars start disappearing. I personally saw a few turn around and head back, and by the time we reached our destination in Ocean Shores the car count was down to 9 when we started with 17. One car went out with ignition issues, all the rest reported overheating. So we start looking at the 'survivors' and realize that with one exception (a original-owner '68 383/4-speed Roadrunner, running hot), all the 'drop-outs' were SBC-powered. The cars that made it without overheating were 4 Fords (one Y-block and three SBF), a Packard, a Olds, and 1 mopar. Two SBCs made it, but both of those also had overheating issues and had to top off their coolant. One (a '28 Essex) opened half his hood during the traffic jam to reduce temps, as he said he wouldn't have made it either without doing this. So all this begs the question; are SBCs more prone to overheating? One of the Ford owners claimed that his '51 F1 had a SBC in it when he got it and he chased overheating issues for several years until he swapped it for a SBF, no more issues. Thoughts?