Year

Engine or 
Car Model

Spark 
Plug Gap

Point
Gap

Dwell
Angle

Firing
Order

Ignition Timing 
(BTDC or Mark)

Valve Lash

Intake

Exhaust

1946

6

.030

.020

35

153624 

4°

.007H

.010H

8

.030

.017

27-30

16258374

5°

.007H

.010H

Super 8

.030

.017

27-30

16258374

4°

Zero

Zero

1947

6

.030

.020

35

153624

6°

.007H

.010H

8

.030

.017

27-30

16258374

7°

.007H

.010H

Super 8

.030

.017

27-30

16258374

6°

Zero

Zero

1958-50

8

.030

.017

27-30

16258374

6°

.007H

.010H

Super 8

.030

.017

27-30

16258374

6°

.007H

.010H

Custom 8

.030

.017

27-30

16258374

6°

Zero

Zero

1951-53

200

.030

.017

27-30

16258374

6°

.007H

.010H

Others

.028

.017

26-33

16258374

6°

Zero

Zero

1954

5400-1-2-11

.025

.017

27-30

16258374

6°

.007H

.010H

Others

.025

.016

26-33

16258374

TDC

Zero

Zero