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Aubrey N Bruneau · 11-06-2011, 05:10 PM

Greg... BBC standard BBC 1.7 ratio ( factory W block is 1.75... but there's nothing in that ratio that handles this abuse ! ). Let's me use the BBC 7/16" stud. Cam has net lift at the valve, of .496" -.500". It all works.
Also, Crane has always had their P/N 15750 gold aluminum rocker for the W engine ( 3/8" stud )... it too, is 1.7 ratio.

11-06-2011, 05:10 PM	#6
Aubrey N Bruneau Member Join Date: Sep 2003 Location: South Eastern Alberta, Canada Posts: 311 Likes: 6 Liked 7 Times in 3 Posts	Re: Roller Rockers in Stock Greg... BBC standard BBC 1.7 ratio ( factory W block is 1.75... but there's nothing in that ratio that handles this abuse ! ). Let's me use the BBC 7/16" stud. Cam has net lift at the valve, of .496" -.500". It all works. Also, Crane has always had their P/N 15750 gold aluminum rocker for the W engine ( 3/8" stud )... it too, is 1.7 ratio. __________________ Aubrey N Bruneau 6409 C/S 62 BelAir sport coupe, 409 HP 409