390 GT

[djburton]

Let's say a 68,69 Fairlane,Torino S code GT 4 speed car...What would you expect to receive, engine and trans wise, with the GT option that would be different than a standard 390?

[bsprowl]

Holley 600 CFM carb replacing the Autolite carb; GT cam and valve springs; GT exhaust manifolds causing the exhaust bolt pattern to be different; air cleaner had an open element; distributor had a different curve; I don't recall which intake manifold was used on the GT - this may vary by year.

Same 10.5 compression ratio so the pistons, short block were common to both.  Valve sizes were the same. 

[djburton]

Thanks! I did see somewhere that the flywheel on the GT was different that standard 390 but can't seem to find it again.

[GerryP]

The GT flywheel is drilled for the bigger clutch.  That's it.