JP Double Row Timing Chain Set Suit SB Chrysler 273-360 & 331-392 Hemi (JP5985)DOUBLE ROW TIMING CHAIN SET Suit SB Chrysler 273 360 & 331 392 Hemi Part Number: JP5985 All JP Performance Timing Chain Sets are supplied with induction hardened and multiple keyway crank sprockets (which have the keyways index marked for easier timing) and balanced camshaft sprockets and a true roller timing chain. Also all sets for engines without factory fitted thrust plates (i. e. Chev V8's and Chrysler big block V8's) are machined with a reverse