my 90 k5 has a 4" bds lift (rear blocks). I currently have 33x12.5x15 and recently grenaded the rear end and replaced with corporate 14 and will be swaping front axle to a dana 44. Anyhow I have to change wheels ( 5 bolt to 8 bolt) so I figure what better time to go bigger. I was looking at the Interco Irok 36x13.5x16. I want to know if it is safe to add a body-lift with my current 4" suspension lift, and will I need 2" or 3", any recomendation or downfalls to watch for? This place is GREAT!!!