up of individual components, the proper length of your pushrods will vary. When you get ready for pushrods, the best way to get your length measurement is to use a 'checking' pushrod. They are available for purchase, or you can easily make one by sectioning a spare and tapping the insides of the two ends. A short piece of threaded rod will make it possible to adjust until you get your length. A call to a manufacturer such as Smith Brothers (800) 367-1533 can have custom-length pushrods on their way to you by the next day.
KS
This message has been edited by cammerfe on Dec 12, 2008 8:43 PM
Comp roller lifters also? I use them with DOVE roller rockers who make the roller rockers for Comp (same). The Comp roller lifters have a 5/16 cup, I used Crane pushrods that are 5/16 ball and 3/8 cup at the top. They are 9.125 or 9.180 long, I'd have to check, it is a standard length & part number for roller applications. They are also a thicker wall tubing specificaly for roller cams and high spring pressures.
One thing you need to check is the 3/8 cup are a little large, it can interfear with the adjusters on the roller rockers on some applications (high lift and/or too long a pushrod) and if there aren't enought threads showing on the adjusters below the rocker body. You only want a few threads showing below. On the top of the adjuster, the you want the un-threaded portion above the lock nut (or the top of the threads even with the top of the lock nut basically).
You can carefully grind a small amount off pushrod cup to help clearance if needed. If you have milled you heads and/or block, deep valve job or long/short valves, shimmed stands to correct geometry, etc. you can have a different "stack" height like Ken is talking about. That is where the pushrod length checker is nice and custom length pushrods aren't a whole lot more expensive if needed.
68 Cougar XR7 street and strip car, 428 4-speed, 3560# of fun, new best 10.43@131.2 1.47 60 ft
This message has been edited by XR7 on Dec 12, 2008 6:26 AM
