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HA ! been a few years, new 76', new house, old town, divorce and mental sanity...... Im back, miss my last truck thats in my profile pic..... Oh the work I put into it.... Matters not, I have a "New" 76-F250-4x4-, Im considering lowering the rear end (long story, matters not) by getting a 2" lift block in place of the 4" stocker. Would like to do this correct the first time, so im trying to determine if I need a tapered block or if the angle of the dangle is going to work without causing vibration etc..... Thoughts ? Experiences ? JeffsBronco has a 2.5" block at the correct 2.25" width that come tapered ... Theres another shop that makes 2.25" blocks custom to height with or without taper and u-bolt holes but they is pricey. Thanks ahead of time for your input.... And yes I read thru dozens of search results...
I’d say Jeff’s. If you desperately want exactly 2 inches, measure the angles on both old and new blocks. Then you could either fab your own with some steel bar stock, or if the Jeff’s unit is steel with enough “extra”, grinder it to the specs you want.
looks like they do have a steel spacer block for 77-later that would probably work, and would take grinding a lot easier. The one your probably looking at is iron, and may not take to grinding down as easily.
My '77 had rear lift blocks from the factory, they had a taper to them being 3" tall @ front, and 3-1/4" @ rear side of blocks. I made some new from odds & ends in my scrap, and kept the same 1/4" difference front to rear of the block, while lowering the truck 1-3/4" at the rear axle by time I finished. My DIY blocks are 1-1/4" @ front edge of block, and 1-1/2" @ back edge of block. My rear springs are 3" wide.
X2 I vote Jeffs, to help with pinion angle. But OEM blocks did not come with any angle to them...so....?
So it seems that at one time I had a set of shorter ones also. No idea what year truck they came off of. But the longer or shorter ones do not have any angle.
This is OEM set up block with a 6" lift springs and a pinion angle shim that came on the leaf.
Mine dohave that 1/4" difference, maybe some do, some don't depending on use? Might be that a divorced TC that sits lower in the truck didn't, but a higher mounted married TC did?
Mine is married. Before lowering, it did look like the driveshaft pointed up more than the differential, but after lowering but keeping the same 1/4" taper in my blocks, it looks the same. Not measured, but one could do so if desired.
Remeasure, yep.
Last edited by tbear853; Feb 19, 2026 at 10:34 PM.
Thanks fellas, gonna try to do the angle math to the best of my ability, I would like to think Jeffs kit would be plug and play seeing its year specific and they been doing this for a minute... https://shop.broncograveyard.com/196...uctinfo/23333/
Although out of stock at the moment...
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Shorter Lift Block Considerations
