Hey I finally found it!!
I finally found some more of my paperwork from
Vought Aircraft Industries (complements of Mr Dick Atkins), from back in 1997 (I've had and still got that much stuff in storage

)
It's great to read back through this stuff ;D
It's regarding the
International Fighter Aircraft - V-1000 Summery by Vought Aeronautics Division, LTV Aerospace Corporation 6 April 1970!
Some of the interesting information pertains to the following -
Performance improvement is attained by:
- 3,884 pound weight reduction.
- An increase in leading edge droop angle for maneuvering and cruise.
- (and of course) Changing to the J79 engine.
The resulting performance characteristics enable the V-1000 to:
- Exceed all mission requirements of RFP (International Fighter Aircraft - IFA)
- Exhibits clear superiority over threat aircraft (I'm assuming MiG-21 'Fishbed') in air-to-air combat (predicted win-loss ratio of 4:1 over threat '111')
A 15% reduction in DMMH/FH (thanks to a reduction and simplification of systems and avionics suit)
Initial operational capability attained by 1 Dec 1973 (one month earlier than required!)
The specified production rate of 10 aircraft per month will be achieved in Oct 1974.
The average fly-away cost of the 325 aircraft will be $1.51m
To enhance the demonstrated combat superiority of the F-8 (Crusader) over MiG-17 and MiG-21 aircraft, and to provide superior combat maneuverability, the V-1000 will differ from the F-8 in these significant areas:
- The J79-GE-17 engine replaces the J57 engine for an installed weight saving of 953 pounds and an improvement in specific fuel consumption.
-
Two M39A3 20mm cannons replace
four Mk 12 (20mm) cannons for an installed weight saving of 61 pounds.
- The F-8 avionics suit will be reduced to the RFP requirement, with an installed weight saving of 125 pounds.
- A total of 349 pounds of internal fuel will be deleted by removing
six fuel cells.
- A
three degree increase in leading edge maneuvering droop has provided an increase in high subsonic maneuverability capability.
All external magnesium skins will be replaced with aluminum to enhance corrosion resistance (important consideration when one considers the IFA being aimed at SEA countries/air forces!)
The aft section (fuselage) will be reinforced locally to withstand the higher cooling and ejector air pressure of the J79 engine.
More to follow.............
Regards
Pioneer