Looks really good but I'm thinking you may regret the blocks especially with the 3.4. Why not do a Chevy swap using 1" or 2" lift springs? That way you could have a good ride and do away with the blocks. The way your building this truck its no problem to do it now rather then later.

(aka suprathepeg, aka Sean)
89 v6 SWB truck "BLACK BEAUTY" EB valves, P&P head 30 over.
95 FZJ80. Lifted. locked and rollin on 33s (my dream machine)