tre5
+1y
I used 2X4 .250.... only because both times I went to purchase the metal they were out of .188. Using .250 is OVERKILL for sure! They sold me the .250 for the same price as the .188 so I went ahead and ran with it.
I also did the frames very different on those 2 trucks. The blazer's new frame is actually set into the factory frame and the bottom is cut off, then the front clip was Z'd up 3"... 2.25" for the body drop and .75" for the amount that the clip hangs lower than the factory frame. The extended cab I did has a new frame from the firewall back.
One thing I would recommend that I didn't do to either truck is to move the cab back 1". It would be as easy as moving the body mounts back when doing the new frame. This will center up the wheel in the wheel well up front. Of course you will need to adjust the wheel base and bed mounts out back to center the wheel in the bed wheel well opening.