2.5" or 4" suspension lift?.....and what brand?

[TexasJimmy]

Thinking about lifting the 71'.

Any suggestions on lift size and brand? Gas, or fluid filled shocks?

I want to keep my current tires and wheels. 33x12.50x15.

Any other mods I need to think about when lifting 4".

I have been pricing lift kits at 4 Wheel Parts. Is there a better place to buy a lift.

Here are some pics. of my Blazer

Thanks in advance,
Tim