Belltech lowering blocks for '83 720

[ShutterMeShort]

So I've been shopping for lowering block kits for my 1983 720.  

 

Belltech doesn't list one for the 1983.  The 1984 calls out for the #6100 kit.  The u-bolts in the 6100 kit are correct as far as 3" spread but I wanted to make sure the length is correct.  I'm seeing that they need to be about 8" long and a 1/2" bolt

Can anyone confirm the right kit number for 2" blocks for an '83 or the u-bolt size/length in the Beltech 6100 kit?

[datzenmike]

Both years 2wd use the same axle and the only difference I can think of is an extra helper spring on the '84 that would need a longer U bolt length. This may be the difference. Slightly too long would work, too short won't.

[ShutterMeShort]

Good to know.

Mine has two full length springs and one short one on the bottom.  2WD.    The bolts I compared and measured up at Napa were 1x2" x 8" long with a 3" spread.

 

I'm pretty sure the 6100 kit is correct, just worried about the bolt length.  I'm also seeing a bunch of people saying the Belltech u-bolts are crap and like to break.  

 

[Crashtd420]

If you can find just the block that would work you can order a better u bolt from these guys... in what ever length, bend, and thread you want..... 

I used them on my 521 because the ones I was finding with the blocks didnt seem quite right....

 

https://www.sdtrucksprings.com/u-bolt-by-measurement-for-leaf-springs

 

 

[Crashtd420]

Oh and it looks like that kit has a flat block... not a tapered one to correct pinion angle, so you might want to keep looking or you may need some angled shims.....

[datzenmike]

This is true. Any raising or lowering will upset the driveshaft angles and introduce vibration. What ever you do get a gauge for this, they aren't expensive and then shim to get it exact.

 

 

My 710 was vibrating (more of a groan) and I didn't notice it till I got rid of it. What a difference!!!

[banzai510(hainz)]

I have the Belltech 6200  or 62002 which is a 3in with a 2 deg slant on my 521 as I did 2 inch and wasn't enough

[Charlie69]

Definitely get tapered blocks.

[ShutterMeShort]

They offer a kit with 2 degree taper.  The Napa kit comes with 2 degree shims

 

Thanks for all your help so far guys!

 

I just put my new wheels on it and I'm going to need 3" anyways!  2" would be fine but 3" will look way better!

[ShutterMeShort]

3" kit with shim ordered from Napa and u-bolts from SDtrucksprings.com. Thanks guys!  I'll come back and post pics when all is done!  Much appreciate the help!

[ShutterMeShort]

Okay, this has taken forever to get around to but a lot has been happening!  Many pics to come.

3" napa blocks with a 2 degree shim, U-bolts from sdtrucksprings.com (thanks Crash), and Beltech drop spindles, and Procomp wheels. 🙂  New shocks all the way around and new brake lines as well.  As a note, the Beltech 5456 sway bar does NOT fit the 720 even though it is listed under the vehicle selection. 😞 Hardbody only.

And thank you all for your help!
 

 

 

[Lukehorror]

That thing is sitting perfect! Could you post links to what you ordered? What size wheels did you go with?

[Charlie69]

On 3/15/2020 at 2:39 PM, datzenmike said:

Both years 2wd use the same axle and the only difference I can think of is an extra helper spring on the '84 that would need a longer U bolt length. This may be the difference. Slightly too long would work, too short won't.

Centering bolt holes shift about 2 1/4" from early 80 to 83 springs to late 84 to 86 springs.  Later springs the axle is pushed to the rear more.

 

Next time I buy early 720 leaf springs I will take a picture with the early and late springs lined up to gether.