Over the last several years, I've done quite a few 124" S&S engines, both hi-compression and the low compression version for customers in south Florida, and central Florida. Young customers, and old customers. The engines don't exhibit any pms when tuned properly. They actually have less compression than the Harley engines do, and come with a better warranty also.
Never had to use big oil pans, ultra-coolers, or fans. Over-heating problems aren't any more than the factory engines.
I currently have one in the works for a customer in Broward County.
If you need any info on the S&S engines pm me.
John