I ran the kit with the non-emissions cam and my first set of heads were bad and went a best of 12.6 @ 108mph.
With the newer style heads 2.02 x 1.60 and the AFM N-61 cam I have went 12.16 @ 113.5mph, I am only running 3:73's and the cam is ground for 4:30-4:56 gears so it has a lot left. Should go 11's since I just added the 30# injectors hoping to get to the track soon, with the 4:30's it should go mid 11's @ 116+.
Do a search on Holley and you will see all the numerous replies I have done about the kit.
Bottom line is it is worth the money in my opinion. What heads does your buddies kit have....Holley has had issues with the first design although they do not admit it. If you have any specific questions e-mail me at Rick91GT@onemain.com
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Check Out My Site 91GT,Holley SysteMAX II Kit-Heads 2.02" x 1.60" port matched to a 1262,Anderson N-61,
30#,76mm C&L,
75mm Accufab, Full MAC, No A/C or PS or emissions, 12" K&N Filter,RNH PERFORMANCE Ram Air,Ron Davis Radiator,Full Suspension, SPEC stage III clutch, Lakewood SFI bell, S&W 8pt "X" brace,JAZ seats,3:73's,Welds..etc,
4:30's and 33 splines coming very soon!
[b]12.16 @ 113.5, 1.78