I got probably one of the first Harken rollers on j30 for #327 back in 1982, subsequently moved that to #505 in 1985 ... and now in process of changing that to a Harken IV Series 1.
the first thing to resolve is the forestay length. and I am having a bit of difficulty translating this site's info.
What I have on the floor now is 35'9" from inside pin to inside pin with max turnbuckle length. That's probably 35'10 to centers of pins.
then what length is the OD measurer going to check once it is installed.
Sorry to say I did not pay better attention when we were measured in Marblehead. Does pin to pin mean dead center of pin? I don't remember any comments about "Sheer Line"http://j30.us/blog/?page_id=322
Forestay 35 ft; 8 in.; 1/4 in.;
Marine Eye to Turnbuckle - Max. Head stay length is 35'10 1/2 in.; measured to the Sheer Line at the bow stem fitting.(rule 126.96.36.199). The measurement listed is pin-to-pin of the stay.
If we take 3 inches off for socking the turnbuckle up that would give me a shortest length of 35' 6" inside pin to inside pin. Use of the word "turnbuckle" also confuses me as that is an adjustable piece of gear.