narrowed frame

I bought my best friends truck to finish,...The frame was narrowed but the bed mounts were not done and the mesurments were never taken,the frame is stock just narrowed for a diff. rear end.....my qust. is does enyone have an idea about were the stock bed mounts are.size and how far apart....

tahts what I did to mine, plopped the bed on, lined it up with 4 jacks, welded the bed mounts on.

you could measure the width of your bed mounts on the bed, the width of the frame, devide it by 2. and thats how far the mounts are away from the frame. however, youd have to do that for every mount you wanna use. so doing what ^^ those guys said will be a lot easier in the long run.