I used the 246/253 duration cam in my 455 way back when.
That was an awesome grind.
Went 12.01 time after time.
Heres a quick breakdown:
Car weighed 3750 at the time.
455 .030 TRWs.
No 13 heads,unported.Just a valve job.
Stock T-2 intake.
Holley 850.
1.75 Heddman headers.
Comp Roller tip rockers.
Torque Tech 3" exhaust with tailpipes.
Generic TCI 3500 conveter.
3.89 gears.
Cam was also advanced 4 degrees.
Gave alot of Mustangs the whooping;as that cam was very streetable.I drove that thing everywhere.
Mark.
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`70 Firebird,Original Owner car
Ken French Built Chassis
Carlquist Competition Engines IA2 505
Competition CNC Ported Super Chiefs
CCE Ported Gustram
Twin Dominators from Shaker 455
963 HP
`09 Electra Glide Standard.
`03 F-350 7.3 6-speed 4x4 Crew Cab Dually.
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