If I put a 4" block in the back of my truck do I need new shocks? Or can I get a 2" block and stack it on the stock ones

 

Yes you will want new/ longer shocks. Rancho makes a nice set.

Also be prepared to buy longer u-bolts than what shows up in the block kit, I've done it twice and both sets were a hair too short. And they were from different companies

 

OK thanks did u put in all new blocks or did u stack them?

 

Although many do stack blocks, even I have in the past, I suggest NOT to stack them! Some have had issues with them kicking out.

Wayne

 

do it right.. dont stack blocks

 

Speaking of blocks i need a place to buy the stock 4x4 u bolts, any other place besides the dealership?

2004 f 150 (non heritage)

(Sorry not trying to hi jack your thread)

 

Are cast blocks better then aluminum blocks?

 

Some truck shops that specialize in springs custom make them. They have a straight rod that they bend up however you want. Tell them the length and diameter you need, width of leaf spring, and if you need a round bend, or a flat bend.

 

What are some shocks that will fit with 2"-2.5" lift block

 

Stock shocks will...