I bought a Hugh's 11" rated at 3,000 stall when I installed the Gear Vendor overdrive in my Coronet. Car weighs 4,175lb, 3.54 gear with 275 15 Nitto Drag Radials. The 540 HEMI has a 248/254 @ .050 solid roller. It would blow right through the converter, and felt mushy on the freeway in overdrive. I sent it to PTC and asked them to make it as tight as possible. It is much improved. The rpm will climb 300 on a long interstate hill @ 75 mph. Flat and level a true 75 mph is 2,500 rpm.