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De Soto
1946-61 Tune-up Specifications 
Year
 
Engine or 
Car Model
 
Spark 
Plug Gap
 
Point
Gap
 
Dwell
Angle
 
Firing
Order
 
Ignition Timing 
(BTDC or Mark)
 
Valve Lash
 
Intake
 
Exhaust
 
1946-48 
All 
.030 
.020
 
35-38
 
153624 
"0"
 
.008H
 
.010H
 
1949-50 
All 
.035
 
.020
 
35-38
 
153624
 
1
 
.008H
 
.010H
 
1951    
All
 
.035 
.020
 
35-38
 
153624
 
1
 
.008H
 
.010H
 
1952-53
 
Six 
.035 
.020
 
35-38
 
153624
 
1
 
.008H
 
.010H
 
V8
 
.035 
.018
 
2
 
18436572 3
 
4
 
Zero
 
Zero
 
1954    
Six
 
.035
 
.020
 
39
 
153624
 
5
 
.008H
 
.010H
 
V8
 
.035
 
.018
 
2
 
18436572  3
 
4
 
Zero
 
Zero
 
1955  
2 Bar. Carb.
 
.035
 
.017
 
2
 
18436572  3
 
4°
 
Zero
 
Zero
 
4 Bar. Carb. 
.035
 
.017
 
34
 
18436572  3
 
10°
 
Zero
 
Zero
 
1956
 
V8-330  2 Bar. Carb.
 
.035 
.017
 
27-32
 
18436572  3
 
8°
 
Zero
 
Zero
 
V8-330 4 Bar. Carb. 
.035
 
.017
 
27-32
 
18436572  3
 
 4°
 
Zero
 
Zero
 
V8-341 
.035
 
.017
 
27-32
 
18436572  3
 6° Zero Zero 
1957
 
V8-325
 
.035
 
.017
 
27-32
 
18436572  3
 
6°
 
Zero
 
Zero
 
V8-341
 
.035
 
.017
 
27-32
 
18436572  3
 
6°
 
Zero
 
Zero
 
1958	
V8-350, 361 1 Carb.
 
.035
 
.017
 
27-32
 
18436572  3
 
6°
 
.060-.210 11
 
V8-361 2 Carbs.
 
.035
 
.017
 
10
 
18436572  3
 
8°
 
.060-.210 11
 
1959 
V8-361, 383 1 Carb.
 
.035
 
.017
 
27-32
 
18436572  3
 
10°
 
.060-.210 11
 
V8-383 Two Carbs.
 
.035 
.017
 
13
 
18436572  3
 
10°
 
.060-.210 11
 
1960  
V8-361, 383
 
.035
 
.017
 
27-32
 
18436572  3
 
10°
 
.060-.210 11
 
1961 
V8-361
 
.035 
.017
 
27-32
 
18436572  3
 
10°
 
.060-.210 11
 
1- Third line after "0" mark.

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

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

4- Fourth line after "0" mark. 

5- Second line after "0" mark.

10- Each set of points 29-32°; total 
dwell both sets 36-39°.

11- With lifter collapsed.

13- Each set of points 27-32°; total
 dwelt bothsets 34-40°.