Vintage Mickey Thompson Aluminum Rods 392 Hemi. I bought out the estate of the former head mechanic for R.C. Williams and these were in a box. The rods were wrapped up in newspapers dated 1984. I have a bunch of other rods and they were all ran in R.C.'s twin engine dragster that set top gas records in 1971. Big ends measure 2.5" small ends approximately .980 I'm measuring with a cheap digital caliper so...center to center are slightly under 7" .980" thick at the big end 1.320" at the small end.