RMK
Also, whereas the FAA also has the 5hr conversion training for differing types
What are you talking about--no such thing. Unless of course you are talking about the 5 hour PIC requirement in order to instruct for the purposes of a certificate or rating. FAR 61.195 (f)
"(f) Training received in a multiengine airplane, a helicopter, or a powered-lift. A flight instructor may not give training required for the issuance of a certificate or rating in a multiengine airplane, a helicopter, or a powered-lift unless that flight instructor has at least 5 flight hours of pilot-in-command time in the specific make and model of multiengine airplane, helicopter, or powered-lift, as appropriate."
Here