No one will probably answer you so here it goes. with the Tbar lift you don't need shackles. Measure no more than 24" from ground to fender in the front. Jack the vehicle up from the skid plate when doing it...Most important get an alignment when done and order some bilstein 1500's from
Bilstein - KYB - Rancho - Monroe - Edelbrock Automotive Truck Shocks and Struts - Shockwarehouse.com about $75 each if you google for a discount code. Stock shocks will bottom out when you hit a bump. New bump stops are your preference. I don't wheel hard and get more articulation without them but its a choice thing. Without changing them your car will nosedive at lights when you hit the brakes. 33" tires are more than enough I would not recommend the 35" tires if you have an I5.
