Jeep 40 Stock Pushrod Length. As for valve springs, the stock springs should work with the stock cylinder head (no head machining or changes in valve stem height). (8/pkg.) stock length ( +.100 long) 3/8 diameter. This is an older thread, you may not receive a response, and could be reviving an old thread. i would spend $20.00 and buy a pushrod length checker. Ball (3,427) cup (1) get results.
In that case i would suggest the 4.0 9.639`s as a baseline but double check with the tool. jeep push rod lengths. push rods amc 258 4.2 liter stock cam & set up. Jeep 40 Stock Pushrod Length in tests conducted by a prominent cam manufacturer, they claim to have found 12 hp on a sbc with a 204/214 @.050 cam (.420/.443 valve lift) just by going from a.065˝ wall stock pushrod to a.080˝ wall pushrod, and the springs were only 110 lbs. That way you know what size pushrods you need. Are you using stock rockers?
390 pushrod lengths Ford Truck Enthusiasts Forums
i would spend $20.00 and buy a pushrod length checker. pushrods help keep your engine lubricated and the pistons pumping. Summit sells them for $16.95 plus shipping. push rods amc 258 4.2 liter stock cam & set up. This is an older thread, you may not receive a response, and could be reviving an old thread. determining pushrod length is among the last custom settings accomplished when assembling a new engine. Are you using stock rockers? Jeep 40 Stock Pushrod Length.