To answer your questions...oops, yes, it's a 302 bottom end, 40 over. And the 1405 Eddy is the manual choke version of the 600 cfm 1406.
From all my research, the best perfomers do appear to be running the tr-y's, at least for the street. Hard for me to argue with years of experience and dyno results.
Seams to me the Shelby addition of the intake and headers where the biggest power changers...the combo of both no doubt really did it, but assigning the power gain of just the headers would be tough. Especially, as Veronica stated, with how poor the original 4V intake was.
Thanks for the link Dan, will check that out now...
'66 GT coupe deluxe, total restoration, not on road since '80...father/sons project... T5. Edelbrock 1405, Weiand Stealth, GT40p's, 1.75" UCA drop, Still building..