[Steve C.]

[QUOTE=Stan Weiss;6435113]Steve,
It is possible that those numbers are from the very same cam. It could just be a matter of where they are looking at seat duration. As you know some use 0.004", 0.045", 0.005", or 0.006" lifter raise.

Good point Stan.


.

[i82much]

Originally Posted by NeighborsComplaint

Yeah, that was early to late 60's terminology. Rather than confuse everyone with advertised duration vs duration at .050" lift, many cam makers ranked their "sticks" as Stock, Street, 3/4 Race (enough overlap for a rough idle) and Full Race.

good to know, thanks!

[Gregg619]

Originally Posted by Formulas

I have a Crane HIT 290-2-NC new on the shelf

I have the same cam in my 1968 400 N that is 60 over and 20 under right now. It has sealed power 411NP60 pistons and 6x-8 heads ready to be put on it. What springs does everyone recommend for this with 1.65 roller rockers?

I understand that the cam should come with the correct springs as a set. That said, the motor had 140 closed-chamber heads on it from a 326, with stock springs, when I got the car. It is getting a complete rebuild now and I just need to get the appropriate springs.

\Greg