Thanks for your feedback! The first version AC Legends was done in collaboration with SmallBlock Hero somewhere in 2016 as far as I recollect. Not much vintage models in AC yet and we stumbled upon the Fatboy model together with some other 70's cars. We started reworking them, as many of this great community of GTP tend to do as well
Selection of the Fatboy model was thus more opportunic then well chosen from a historic perspective. Would we've done it again 'from scratch' (as far as that definition counts for conversions anyway) I surely would have chosen your suggestion as well.
Currently we're working on an massive overhaul for the AC Legends GT cars, (All models updated to current state of CSP + wipers, lights etc and all physics rebuilt (now with suspensions from scratch and new tyremodel) but given the amount of work I dunno if we will add the above model as well. (A new 60's GTC pack will be added as well).