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FORD * MERCURY

1970-75 Tune-up Specifications

Year
Engine or 
Car Model
Spark Plug
Type (A) 
- Gap
Point
Gap
Dwell
Angle
Firing
Order
Ignition Timing 
(BTDC or Mark)1
Hot Idle 
Std.
Tran
Auto
Tran 2
1970
6-170
BF-82/.035
.027
35-40
153624
750
550
6-200
BF-82/.035
.027
35-40
153624
750
550
6-250
BF-82/.035
.027
35-40
153624
800/
500 12 
500
8-302
BF-42/.035
.021
24-29
15426378
800/
500 12
600/
500D 12
8-302 BOSS
AF-32/.034
.020
30-33
15426378
16°
800/
500 12
-
8-351 5, 7
AF-42/.034
3
3
13726548
700/
500 12
600/
500D 12
8-351 Std. trans 5, 8
BF-42/.034
3
3
13726548
700/
500 12
-
8-351 Auto trans 5, 8
BF-42/.034
3
3
13726548
10°
700/
500 12
-
8-351 6
AF-32/.034
3
3
13726548
800/
500 12
600/
500D 12
8-428
BF-32/.034
3
3
15426378
800/
500 12
600/
500D 12
8-429 Auto trans 6
BF-42/.034
3
3
15426378
700/
500 12
700/
50012
8-429 CJ
AF-32/.034
3
3
15426378
10°
700
600
8-429 BOSS
AF-32/.034
.020
30-33
15426378
10°
700
-
1971
6-170
BRF-82/.034
.027
35-40
153624
750 16
-
6-200
BRF-82/.034
.027
35-40
153624
750 16
550D 16
6-250
BRF-82/.034
4
4
153624
750/
500 12
600/
500D 12
8-302
BRF-42/.034
.021
24-29
1546378
800/
500 12
600/
500D 12
8-302 BOSS
AF-32/.034
.020
30-33
1546378
16°
800/
500 12
-
8-351 5
ARF-42/.034
3
3
13726548
700/
500 12
600D
8-351 6
ARF-42/.034
.021
24-29
13726548
800/
500 12
600D
8-429 CJ
AF-32/.034
.021
24-29
15426378
10°
700/
500 12
650
/500D 12
8-429 SCJ
AF-32/.034
.021
24-29
15426378
10°
650
/500 12
700/
500D 12
1972
6-170
BRF-82/.034
.027
35-39
153624
6°
750
-
6-200 no A/C
BRF-82/.034
.027
35-39
153624
6°
750
550D
6-200 A/C
BRF-82/.034
.027
35-39
153624
800/
500 12
600/
500D 12
6-250
BRF-82/.034
.027
35-39
153624
6°
550
550D
6-250
BRF-82/.034
.027
35-39
153624
750/
500 12
600/
500D 12
8-302
BRF-82/.034
.017
26-30
15426378
575
575D
8-302
BRF-82/.034
.017
26-30
15426378
6°
800/
500 12
600/
500D 12
8-351 5
ARF-82/.034
.017
26-30
13726548
6°
750/
500 12
575/
500D 12
8-351  CA 5
ARF-42/.034
.017
26-30
13726548
6°
-
625/
500D 12
8-351 Std. trans 6
ARF-42/.034
.020
26-30
13726548
16°
1000/
500 12
-
8-351 Auto trans 6
ARF-42/.034
.017
26-30
13726548
16° 10
-
700/
500 12
8-351 Auto trans CA 6
ARF-42/.034
.017
26-30
13726548
16°
-
800/
500 12
8-352 H.O.
ARF-42/.034
.020
26-30
13726548
10°
1000/
500 12
-
8-400 
ARF-32/.030
.017
26-30
13726548
11
-
625/
500D 12
8-429
BRF-42/.034
.017
26-30
15426378
10°
-
600/
500D 12
1973
6-200
BRF-82/.034
.027
35-39
153624
6°
800
650D
6-250
BRF-82/.034
.025
37-39
153624
6°
750
600D
8-302 
BRF-42/.034
.017
24-30
15426378
6°
800
650D
8-351  5, 9
BRF-42/.034
.017
30-33
13726548
6°
-
625D
8-351  5, 13
ARF-42/.034
.017
30-33
13726548
10°
-
625D
8-351 6
ARF-42/.034
17
18
13726548
14
900
700D
8-400 
ARF-42/.034
.017
24-30
13726548
6°
-
625D
8-429 
ARF-42/.034
.017
24-30
15426378
18°
-
600D
8-460
ARF-42/.034
.017
24-30
15426378
14°
-
600D
1974
 
6-200
BRF-82/.034
.025
33
153624
6°
750 
550D
6-200 21
BRF-82/.034
-
-
153624
6°
750
550D
6-250
BRF-82/.034
.025
33
153624
6°
600
600D
6-250 21
BRF-82/.034
-
-
153624
6°
600
600D
8-302 
BRF-42/.034
.017
26-30
15426378
6°
850
575D
8-302 21
BRF-42/.034
-
-
15426378
6°
850
575D
8-351  5, 9
BRF-42/.034
.017
26-30
13726548
-
600D
8-351 5, 9, 21
BRF-42/.034
-
-
13726548
6°
-
600D
8-351 5, 13
ARF-42/.044
.017
26-30
13726548
10°
-
650D
8-351 5, 13 , 21
ARF-42/.044
-
-
13726548
10°
-
650D
8-351  6
ARF-42/.034
.01717
26-31
13726548
14
900
800D
8-351 6, 21
ARF-42/.034
-
-
13726548
14
900
800D
8-400 21
ARF-42/.044
-
-
13726548
19
-
625D
8-460 21
ARF-52/.054
-
-
15426378
20
-
650D
1975
6-200 21
BRF-82/.044
-
-
153624
6°
750
600D
6-250 21
BRF-82/.044
-
-
153624
6°
750
600D
8-302 21
ARF-42/.044
-
-
15426378
6°
900
650D
8-351 15, 21
ARF-42/.044
-
-
13726548
14°
 
650D
8-351  9, 21
ARF-42/.044
-
-
13726548
-
 
650D
8-400 21
ARF-42/.044
-
-
13726548
12°
 
650D
8-460 21
ARF-52/.044
-
-
15426378
14°
 
650D

Back

A- Autolite

1- BTDC - Before top dead center

2 - D- Drive     

3 - Dual diaphragm .021 gap,
24-29° dwell.
Single diaphragm .017 gap,
26-3°1 dwell.

4 - Dual diaphragm .027 gap,
35-40° dwell.
Single diaphragm .025 gap,
37-42° dwell.
5- Two barrel Carburetor

6 - Four barrel carb.

7- Fairlane & Montego

8- Mustang & Cougar

9- Windsor engine

10- Cougar with 12 inch 
converter 10° BTDC

11- Exc CA 8° , CA 6°
 12- Higher figure is with
throttle solenoid energized
13- Cleveland engine

14- Manual trans 16° BTDC, 
Auto trans 18° BTDC

15-  Modified engine

16- A/C add 50 rpm with
head light  high beams
on and A/C off
17-Manual .020, 
Auto tran .017

18- Manual 32-35°
 Auto 24-30°

19- Cougar 14° ,all 
others 6°

20- Cougar 14° ,all 
others 10°

21- Breakerless distributor