Dan,
The 390-4V GT engine was not available in 1969.
The 1969 Cougar was available with a 390-4V IP engine. The last year for the 390 GT engine was 1968. Look in the 1969 shop manual.
The 390IP engine in your 1969 Cougar had a milder cam and the Autolite 4V carb was used to meet emissions standards. The 1968 390GT used the Holley 600 CFM 4V and needed Thermactor smog pump to meet the same emission levels. Ford saved big bucks by not having to install the smog plumbing and horsepower was only down a little.