Owen I have a drop in JE 2.835 bore fo 35" but will not work with arc rods only with .490 pin rods that have longer rod ratio total piston rod combo 30 percent lighter than other brands. not the chepest But you get what you pay for. 7075 rods with inserts,ARP rod bolts Have been tested in engines that run in exces of 10,000 RPM.you should gime them some serious thought