Surprised how closely fuselage width, depth, and cross section match between the two kits. Meant to be ?
Dunno if becomes attack or recon. Attack could get nose radome while recon gets OOB SR-71 nose. Is a weapons bay in F-19 portion. Seal up or retain.
Yes, extended length does improve appearance from stumpy short range fighter to one with some legs.
Did enough cutting & sanding to place front and rear together w/o glue for basic appearance photo. Using two SR-71 kits could make front longer.
see attached