428CJ Stock Class Valve Lift .527 ?

DeuceCoupe · 09-16-2021, 02:10 PM

We cant figure this out on Fordfe.com

NHRA Blueprint .DOC files for 1968-69-70 say the 428CJ valve lift is
.481 .490 ok
But a footnote for each year shows an OPTIONAL 428CJ cam with lift
.527 .527

I've read that Ford said the C8AX-C hydraulic cam was "optional", with lift of
.500 .500 1.73 rockers or
.509 .509 1.76 adjustable rockers
AFAIK no 428CJ ever left the factory with that cam but several sources say it was NHRA Stock legal even back to 1968.

But a cam with
.527 .527 lift in STOCK class 428CJ
Is this a typo (for all 3 years) or what?
What are stock class 428CJ's running today as max lift? .509 or .527?
thanks in advance

09-16-2021, 02:10 PM	#1
DeuceCoupe Member Join Date: Feb 2016 Posts: 274 Likes: 98 Liked 48 Times in 44 Posts	428CJ Stock Class Valve Lift .527 ? We cant figure this out on Fordfe.com NHRA Blueprint .DOC files for 1968-69-70 say the 428CJ valve lift is .481 .490 ok But a footnote for each year shows an OPTIONAL 428CJ cam with lift .527 .527 I've read that Ford said the C8AX-C hydraulic cam was "optional", with lift of .500 .500 1.73 rockers or .509 .509 1.76 adjustable rockers AFAIK no 428CJ ever left the factory with that cam but several sources say it was NHRA Stock legal even back to 1968. But a cam with .527 .527 lift in STOCK class 428CJ Is this a typo (for all 3 years) or what? What are stock class 428CJ's running today as max lift? .509 or .527? thanks in advance