you wont need a 2.5" block. that would really make your rear sit high even with cranking the torsions. IIRC Nick at NorCal says that the 2.5" blocks come with a 4" lift kit. I have 1.5" blocks and I cranked my torsions about 2" and I have the factory rake back.
Nick also said to go with longer shocks for 1.5" blocks..so yes.
i put new keys up front and got like 2.5 inches out of them and the blocks will cancel the level which i want it' sjust a cheap lift for now tilli can afford the real thing i picked it up cheap off a guy on the site
well, be prepared to have to replace more front end parts and possibly CV axles soon...if you raise too high it will bind the CV axles. Also, the upper ball joints will go bad quite a bit faster since you will probably tear the boots pretty quick.
They correct the ball joint angle for cranked bars...easier to change and allow full droop of the suspension. they cost just as much as the factory UCAs and you dont have to worry about ball joints popping out if you just press in new ones in the factory arms. You can also put dual shocks on the front too with them and they work with all lifts as far as I know.