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ACL makes a nice piston. Never had any problem with them in anything.

heavy ditto on the dizzy mech advance. You can see it with a timing light. Rev the motor to 3000ish and with a worn advance mechanism, you can see the spark scattering all over the place. You can also see sticky advance and vac advance by using the light and alternately slowly and quickly revving the motor.


I just found my build sheet from 10 years ago. My ACL slap may be from the machine shop setting the clearance to the high side.

87 Turbo Intercooled Raider, roller cam, torsen rear diff, LSD front diff, lockup auto with modified converter, V6 brakes, low transfer case gears...