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AMERICAN MOTORS
1958-64 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
 
1958
 
 
6-L-head
 
.035
 
.016
 
28-35
 
153624
 
3°
 
.016H
 
.018C
 
6-O-head
 
.035
 
.016
 
28-33
 
153624
 
5°
 
.012H
 
.016H
 
8-250
 
.035
 
.016
 
28-32
 
18436572 1
 
5°
 
.012H
 
.014H
 
8-327
 
.035
 
.016
 
28-32
 
18436572 1
 
5°
 
Zero
 
Zero
 
1959
 
 
Flat Head Six
 
.035
 
.016
 
28-35
 
153624
 
3°
 
.016C
 
.018C
 
OHV six
 
.035
 
.016
 
28-35
 
153624
 
5°
 
.012H
 
.016H
 
8-250
 
.035
 
.016
 
28-32
 
18436572 1
 
TDC
 
.012H
 
.014H
 
8-327
 
.035
 
.016
 
28-32
 
18436572 1
 
5°
 
Zero
 
Zero
 
1960
 
6-American 2
 
.035
 
.020
 
37-41
 
153624
 
3°
 
.016C
 
.018C
 
6-American Custom 3
 
.035
 
.016
 
28-35
 
153624
 
8°
 
.012H
 
.016H
 
6-American Custom 4
 
.035
 
.016
 
28-35
 
153624
 
10°
 
.012H
 
.016H
6-Rambler 
.035
 
.016
 
28-35
 
153624
 
5°
 
.012H
 
.016H
 
8-250
 
.035
 
.016
 
28-32
 
18436572 1
 
TDC
 
.012H
 
.014H
 
8-327 250hp
 
.035
 
.016
 
28-32
 
18436572 1
 
TDC
 
Zero
 
Zero
 
8-327 270hp
 
.035
 
.016
 
28-32
 
18436572 1
 
5°
 
Zero
 
Zero
 
1961
 
6-American 2
 
.035
 
.020
 
37-41
 
153624
 
3°
 
.016C
 
.018C
 
6-American Custom 3
 
.035
 
.016
 
28-35
 
153624
 
8°
 
.012H
 
.016H
 
6-American Custom 4
 
.035
 
.016
 
28-35
 
153624
 
10°
 
.012H
 
.016H
6-Rambler 
.035
 
.016
 
28-35
 
153624
 
8°
 
.012H
 
.016H
 
8-250 Std trans
 
.035
 
.016
 
28-32
 
18436572 1
 
TDC
 
.012H
 
.014H
 
8-250 Auto trans
 
.035
 
.016
 
28-32
 
18436572 1
 
5°
 
.012H
 
.014H
 
8-327 
.035
 
.016
 
28-32
 
18436572 1
 
5°
 
Zero
 
Zero
 
1962
 
6-American L-head 
.035
 
.020
 
36-42
 
153624
 
3°
 
.016C
 
.018C
 
6-American OHV 2
 
.035
 
.016
 
28-35
 
153624
 
8°
 
.016H 5
 
.018H 5
 
6-American OHV 3
 
.035
 
.016
 
28-35
 
153624
 
10°
 
Zero 6
 
Zero 6
6-Rambler 
.035
 
.016
 
28-35
 
153624
 
5°
 
.012H
 
.016H
 
8-327 Std trans
 
.035
 
.020
 
28-32
 
18436572 1
 
5°
 
Zero
 
Zero
 
8-327 Auto trans
 
.035
 
.020
 
28-32
 
18436572 1
 
3°
 
Zero
 
Zero
 
1963
 
6-American L-head 
.035
 
.016
 
31-34
 
153624
 
3°
 
.016C
 
.018C
 
6-American OHV 2
 
.035
 
.016
 
31-34
 
153624
 
8°
 
.012H 7
 
.016H 7
 
6-American OHV 3
 
.035
 
.016
 
31-34
 
153624
 
10°
 
.012H 7
 
.016H 7
6-Rambler 
.035
 
.016
 
31-34
 
153624
 
11
 
.012H 7
 
.016H 7
 
6-232
 
.035
 
.016
 
31-34
 
153624
 
5°
 
Zero
 
Zero
 
8-Std  trans
 
.035
 
.016
 
28-32
 
18436572 1
 
TDC
 
Zero
 
Zero
 
8-Auto trans
 
.035
 
.016
 
28-32
 
18436572 1
 
5°
 
Zero
 
Zero
 
1964
 
6-American L-head 
.035
 
.016
 
31-34
 
153624
 
3°
 
.016C
 
.018C
 
6-American OHV 2
 .035 .016 31-34 153624 8° 
.012H 7
 
.016H 7
 
6-American OHV 3
 .035 .016 31-34 153624 10° 
.012H 7
 
.016H 7
6-Rambler .035 .016 31-34 153624 5° 
.012H
 
.016H
 
6-232
 .035 .016 31-34 153624 5° 
Zero
 
Zero
 
8-Std  trans
 .035 .016 28-32 18436572 1 TDC 
Zero
 
Zero
 
8-Auto trans
 .035 .016 28-32 18436572 1 5° 
Zero
 
Zero
 
 1- Cylinders numbering front to rear:
Left  bank 1357 Right bank 2468 

2- Std. trans

3- Auto trans

4- Power steering add 2°
 
5- Cast iron block

6- Aluminum block

7- With aluminum block hydraulic
lifters are used and clearance is
zero