1 mallory technical support (216) 688-8300 promaster series installation instructions form inst85551m 12/09 how to install the distributor 1. if the distributor to be replaced has not already been removed from the engine, remove its cap. do not remove the spark plug wires at this time. 2. crank the engine slowly until the rotor blade aims at a fixed point on the engine or firewall. note this point for future reference. 3. unplug all external connectors coming from the distributor. 4. now put the existing cap back on and note and mark which spark plug wire the rotor (blade) is pointing at. then number the wires according to cylinder and remove the wires. if in doubt you can leave the wires connected to the old cap and transfer them to the new cap and distributor later in the process (see point # 9). 5. loosen and remove the distributor hold-down bolt and clamp. lift the old distributor out. at this point the rotor may spin and move from its position. this is because of the distributor gear. 6. lower the new distributor into position. the rotor should be aimed at the same fixed point as was the rotor from the old distributor. after the new distributor has been lowered into place, you may find that it hasn't seated firmly against the intake manifold. this indicates that the lower end of the distributor shaft is not properly aligned with the oil pump drive rod. do not attempt to force the distributor into position. 7. install the gasket using plenty of the supplied lubricant. 8. reinstall the hold-down clamp and thread the bolt just enough to exert a very slight pressure against the distributor. if the distributor was not firmly seated, manually rotate the engine until the distributor drops down into place. 9. with the distributor properly seated, tighten the hold- down bolt just enough so that the distributor is held in place, but can still be rotated with a little effort. 10. remove the plug wires one at a time from the old cap and install them in the corresponding positions of the new cap. after all wires have been transferred, verify that the wire in the terminal post that is aligned with the rotor leads to number one cylinder. if you are unsure of cylinder number position or firing order, this information can be found in the service manual that covers your particular engine. put on the distributor cap. 11. reconnect the wiring lead from the distributor to the ignition switch. at this time you can begin timing. 1 ?machined chevy v8 distributor 1 - rotor, 1 - distributor cap 1 - wire retainer 2 - 1.5" self tapping screws 1 - advance kit 1 - gasket 1 - tube of gear lubricant 2 - o-rings 1 - vacuum advance lock-out kit (if equipped with vacuum advance) included with the distributor: please read these instructions before installing. you should always disconnect the battery, negative lead first, before working on the ignition system. when you are done reconnect the battery installing the negative lead first.
2 mallory ignition www.malloryperformance.com 2 form inst85551m 12/09 printed in u.s.a. mallory is a division of prestolite performance 10601 memphis ave. #12, cleveland, oh 44144 216.688.8300 fax 216.688.8306 advance bushings there are 3 different advance bushings included in the hardware package. the distributor comes with a 21? bushing already installed. if a different degree of advance is desired, follow the procedures to change the bushings. how to set up the advance bushings ?take off the locknut and washer at the bottom of the advance assembly at the bottom of the bushing pin. ?the bushing will slide off. ?select the new bushing and install. ?install the washer and locknut. how to set up the mechanical advance lock out 1. remove the springs, weights and the advance stop bushing from the advance assembly. 2. remove the roll-pin and gear at the bottom of the distributor. 3. lift the shaft at least two inches out of the housing, but do not remove the shaft. 4. turn the shaft 180?so the bushing pin slides into the small hole on the advance plate. 5. put the locknut and washer back onto the advance bushing pin, which locks the advance in place. 6. install the drive gear and roll-pin. note: when installing a high performance ignition system with this distributor, please refer to the instructions that come with the ignition control box. this distributor has the correct color code. how to set up the vacuum advance lock out on the #8360M and #8361m distributors if you do not want to use the vacuum advance canister of the has supplied a lockout mechanism. 1. remove the two allen head screws that hold the advance canister. 2. remove the snap ring that holds the magnetic pickup assembly in place. 3. gently lift up on the magnetic pickup plate and slide the vacuum canister out. 4. install the lockout plate in place of the canister. install the two retaining screws. 5. install the supplied screw and washer through the lockout and tighten. 6. it is important to make sure the pickup plate is parallel with the housing of the distributor. if it is cocked or slanted, the paddles of the reluctor may contact the pickup. check the clearance by rotating the distributor shaft. if necessary, use the supplied shims under the lockout hold-down to correctly position the pickup plate. note: if no shims were required, use one beneath the washer of the lock-out hold down screw. note: do not forget to plug the original vacuum advance hose. how to wire the ready-to-run #8360M distributor red lead to coil (+) positive orange lead to coil (-) negative black lead with the larger ring terminal to engine ground. bushing size 28 o 25 o 21 o 18 o
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