lowering blocks and airbags

[jlaird]

What's the deal with using lowering blocks together with airbags on a truck where the coils are replaced with bags. Is this a common thing? are the blocks safe? Just looking for some general info. Bagd72Chevy has this setup and it looks pretty damn good. How do you determine what size blocks you use.

Thanks.

[orange72]

a lot of times blocks are used on 67-72 trucks with trailing arms so that you can get more drop because of the trailing arm hitting the frame and limiting you on how low you can go. i would say that they are safe if you keep them to a resonable amount of drop such as a 2 to 3 inch.

[bagged72blaz]

Just remember you loose clearance under the arms.

[SCOTI]

bagged72blaz Just remember you loose clearance under the arms.

As long as you keep the blocks less than 2" in height they won't affect your scrub line even when using 15" wheels.

Like the others said, the use of blocks in trailing arm trucks is for added drop w/o affecting ride quality. Blocks work the same whether your using springs or bags so it's another option when lowering.

I have aluminum 1.5" blocks on my 68 which currently uses 15" wheels, & have 2" steel blocks on my 67 w/20" wheels.

[jlaird]

Thanks for the replies. So, I'm going to ask a question that I should probably know. What is a scrub line?

[bagged72blaz]

Um I'm not sure the exact deff. of scrub line. but minumim ground clearance is the main thing you should worry about. the lowest part of the undercarraige. The idea is to go as low as possible with the maximum amount of ground clearance possible.

Blocks do set the trailing arm directly under the rear end closer to the ground. No matter the tire size. You don't need blocks with bags unless you want to go really low. Like lay frame. Which isn't safe in my opinion.

[Tx Firefighter]

The scrub line is a line drawn from side to side at the level of the bottom of the wheel. That way, if something hangs below this line, and the tire goes flat, the low hanging item will scrub the ground.

Nothing shoould ever hang below the bottom of the wheel rim.

[Fat Tom]

Ones stronger, and one doesn't rust.