pushrods
pushrods
Logistics Pro
Joined: Mar 2005
Posts: 3,771
Likes: 80
From: tujunga, calif
That is something I never really understood. What was physically different that would require the two different lengths?
Cargo Master
Joined: Apr 2003
Posts: 2,389
Likes: 58
The difference is in the heads. 54-55 and 60-64 use the long pushrods. 56-59 use the short pushrods.
The difference would have to be the distance from the deck surface to the rocker stand mounting pads.
While I've never measured that dimension, I have used the short pushrods on 1960 castings and it required the adjuster screws to be turned nearly all the way in. When the same pushrods and rocker assemblies were used on 1957 castings, and the same block, the adjustment was closer to the middle of the screw.
The block these were used on had the deck 0'd and the heads had been milled. Had that not been done, the shorter pushrods may not have worked at all with the 1960 heads.
I should add that you should not mix and match. Use the correct pushrods.
The difference would have to be the distance from the deck surface to the rocker stand mounting pads.
While I've never measured that dimension, I have used the short pushrods on 1960 castings and it required the adjuster screws to be turned nearly all the way in. When the same pushrods and rocker assemblies were used on 1957 castings, and the same block, the adjustment was closer to the middle of the screw.
The block these were used on had the deck 0'd and the heads had been milled. Had that not been done, the shorter pushrods may not have worked at all with the 1960 heads.
I should add that you should not mix and match. Use the correct pushrods.
Logistics Pro
Joined: Mar 2005
Posts: 3,771
Likes: 80
From: tujunga, calif
The difference is in the heads. 54-55 and 60-64 use the long pushrods. 56-59 use the short pushrods.
The difference would have to be the distance from the deck surface to the rocker stand mounting pads.
While I've never measured that dimension, I have used the short pushrods on 1960 castings and it required the adjuster screws to be turned nearly all the way in. When the same pushrods and rocker assemblies were used on 1957 castings, and the same block, the adjustment was closer to the middle of the screw.
The block these were used on had the deck 0'd and the heads had been milled. Had that not been done, the shorter pushrods may not have worked at all with the 1960 heads.
I should add that you should not mix and match. Use the correct pushrods.
The difference would have to be the distance from the deck surface to the rocker stand mounting pads.
While I've never measured that dimension, I have used the short pushrods on 1960 castings and it required the adjuster screws to be turned nearly all the way in. When the same pushrods and rocker assemblies were used on 1957 castings, and the same block, the adjustment was closer to the middle of the screw.
The block these were used on had the deck 0'd and the heads had been milled. Had that not been done, the shorter pushrods may not have worked at all with the 1960 heads.
I should add that you should not mix and match. Use the correct pushrods.
Cargo Master
Joined: Apr 2003
Posts: 2,389
Likes: 58
Earlier heads came with troughs under the rocker stands which would also add to the height. I'm not sure exactly when those were phased out but later heads did not use those.
Another thing that would affect the pushrod length, everything else being equal is the position of the valve in the head.
There is about 3/16" difference between the long and short pushrods. From Mummert's site, 8.320" overall length and 8.125" oal. So you can pull one to measure.
As long as it is functioning well and there are no problems, it will be ok to leave it as it is.
Another thing that would affect the pushrod length, everything else being equal is the position of the valve in the head.
There is about 3/16" difference between the long and short pushrods. From Mummert's site, 8.320" overall length and 8.125" oal. So you can pull one to measure.
As long as it is functioning well and there are no problems, it will be ok to leave it as it is.
Trending Topics
Logistics Pro
Joined: Mar 2005
Posts: 3,771
Likes: 80
From: tujunga, calif
My 292 runs like a Swiss watch so I have no plans to make changes. I just started working on a new Y block but don't have a use for it yet. I have an old set of the troughs from a 55 engine, maybe when they stopped the troughs and the head casting difference combination they used the shorter push rod also?
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
wagonerkl
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
26
Jul 25, 2011 10:03 PM
fordnut2008
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
4
Aug 28, 2008 09:56 AM
mav4804
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
12
Dec 28, 2003 01:40 AM