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1946-64 Tune-up Specifications
 
Year Engine Car Model Spark Plug Gap Point Gap Dwell Angle Firing Order Ignition Timing (BTDC or Mark) Valve Lash
Intake Exhaust
1946-48 All .028 .015 36
1
3
 Zero Zero
1949-51 All .030 .015 28 15486372
2
 Mark Zero Zero
1952-54 All .030 .015 28 15486372
2
 3° Zero Zero
1955 All .034 .015 26-28 15486372
2
 5° Zero Zero
1956-57 All .034 .015 26-28 15486372
2
 5° Zero Zero
1958 All .034 .015 26-28 15426378
2
 6° .078 - .218
4
1959-62 All .034 .017 26-31 15426378
2
5
 .078 - .218
4
1963 All .034 .017 26-31 15426378
2
 8° .078 - .178
4
1964 All
7
8
9
 15426378
2
 8° .078 - .178
4
 

1 - Cylinder numbering (front to rear): Left bank 1-3-5-7-9-11 Right bank 2-4-6-8-10-12 Firing order 1-4-9-8-5-2-I1-10-3-6-7-12

2 - Cylinder numbering (front to rear): Right bank 1-2-3-4 Left bank 5-6-7-8

3 - There are no timing marks. Spark may be advanced or retarded by adjusting vacuum brake set screw on distributor housing.

4 - With rocker arm rotated to collapse lifter, the clearance listed should exist between end of valve stem and rocker arm.

5 - 1959 6° 1960-62 8°

7 - Conventional ignition .034" Transistor ignition .030"

8 - Conventional ignition .017" Transistor ignition .020"

9 - Conventional ignition 26-31° Transistor ignition 22-24°