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

2- Std. trans

3- Auto trans

4- Power steering add 
5- Cast iron block

6- Aluminum block

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