Opinion on SWTD hulls

What is everyones opinion on South Wind Tunnel Dragster hulls? I have a guy with one locally that is in quite good shape, but I know little about these Southwind hulls.

Also what do they generally weigh? (18-19ft)

Also, this guy says it is a 1985 but I am having much trouble finding anything above 81, was there ever any 85s?
Another question, it has Sonny Leonard written on it and thats what it was called by the owner, a Sonny Leonard Tunnel Dragster, not South Wind.
But i am pretty much sure it is Southwind as its the exact same hull as South Wind and Sonny Leonard comes up with a guy/company who builds engines.

Opinions?