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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 .025 .017 27-30 16258374 2° .008H .010H
1949-50 All .035 .017 27-30 16258374 "0" .008H
3
 .010H
3
1951-54 All .035 .017
1
 18436572
2
 "0" Zero Zero
1955 All .035 .017
1
 18436572
2
 6° Zero Zero
1956 All .035 .017
4
 18436572
2
 4° Zero Zero
1957 All .035 .017
5
 18436572
2
 6° Zero Zero
1958 All .035 .017
5
 18436572
2
 6° .060 -.210
10
1959 All .035 .017
12
 18436572
2
 10° .060 -.210
10
1960 All .035 .017 27-32 18436572
2
 10° .060 -.210
10
1961-63 All .035 .017 27-32 18436572
2
 10°
15
 .060 -.210
10
1964 All .035 .017 28-33 18436572
2
 10°
15
 .060 -.210
10
 

1 - Each set of points 26-28°, total dwell both sets 32-36°

2 - Cylinders numbering front to rear: Left 1357 Right 2468

3 - Zero lash with hydraulic lifters

4 - Each set of points 29-32°, total dwell both sets 32-36°

5 - Each set of points 29-32°, total dwell both sets 36-39°

12 - Each set of points 27-32°, total dwell both sets 34-40°

15 - Whenever idle speed or ignition timing is adjusted, vacuum line to brake release mechanism must be disconnected and plugged to prevent parking brake from releasing when selector lever is moved to drive. Set idle speed with A/C compressor operating.