1990 Celica GTS (production date 11/89) had leak through oil seal of distributor into cap/rotor/ignition module. The build up of oil buggered up the module, which in turn has three hall effect sensors for controlling the timing advance by ECU. I have loss of power above 4000 rpm, and only way to improve the power is to advance the timing from 10 to ~15 BTDC to help the start point for the advance. I need a working module, and boy they are hard to locate. The 1990 GTS is the only car that I can find that used these particular Cardone distributors, 31-74424 and 31-74425. Anybody know what the difference of these 2 distributors are? The rebuild kit (seals and bearing) from Kbox fits either one, so I suspect the difference is the module. Does the different modules work/not work with the current ECU programming? Anybody know where to get one of these modules? Dealers want $500+ for the complete package. Some online parts stores have rebuilt ones, but havent gotten a straight answer which exact module/distributor it is.