Any love for a 373 SB

well you guys got me interested in this build for my 340 block , my 5 mpg 426 stroker is getting out of hand have to fill the tank twice a day , **** that . tinking about this molnar crank
MOLNAR FORGED CRANK: SB CHRYSLER 340 3.790" x 340M x 2.100"(EACH) - 340-3790EB6F
with matching molnar h beam rods be cheaper to do this than drive the car as is , $140.00 a day in gas more if i use race gas which is $25.00 + a gallon 372 sounds lika a good compromise between mpg/hp
So what combo makes yours a 426?