C.W. Williams ran a wing spread years ago that was very difficult to defend.
Not exactly the Pistol. He ran it at Zephyr for a number of years and was at Covington with Blue Willis as the Pitch Back.
He had two variations. First, was with two split ends a wing back (really a slot back) a short QB at 4-5 yards and a Pitch Back 3-4 yards behind the QB and offset behind the wing back.
The second variation brought the ends in tight, but, with the same wing back, QB and pitch back set.
His concepts could be adapted and used in a Pistol formation, with a Split end, Center, Tight End, Wing Back and Tail Back. The Pistol would add the dive to his already very effective offense. Here is one of my favorite plays, Pitch, 2, 7, cross block, line. Pitch to the Pitch Back, 2 and 7 was an in route by the LE and Post by the RE. The Cross block was by the wing back, who would hit the rushing DE and run a line toward the sideline. The Pitch back would read wing backs route and if covered had the option to run or hit any of the other receivers. for this play the Center had the option to find any open area down the middle and was often left open.
I learned the entire offense directly from him and plan to use it when I return to coaching sixman FB in 2018 when I retire from the Army and will incorporate this pistol option with the dive, etc.
I currently live just SE of Dallas in Combine, Tx and C.W. lives in Walnut Springs if any coaches new to Sixman FB in the area are interested in learning his Xs and Os.