Stargazer 2006..... sorry, that's all the book says...... :'(
A clarification, it's not clear from my previous post, the FR-1 and XF2R-1 had the GE I-16 (J31) jet engine, of 1600 lbst thrust, whereas in the XFR-4 it was replaced by a Westinghouse J34 of 2000 lbst.
Also, from page 57 of the above mentioned book, "...The XF2R-2 was to have the GE TG-100 turboprop as tested on the XF2R-1 Darkshark, and the J34 with fuselage intakes as tested on the XFR-4."
cheers,
Robin.