This information is posted in the interest of local source and possibly saving some money. The spark coil required for the non-ballasted MG ignition system is a common type widely used around the world. These should be available at any local auto parts store, and lots of other kinds of motorized equipment dealers. This is an extensive list of coils that do not require a ballast resistor and can be installed with no modifications necessary to the wiring harness.
Beware that prices vary considerably. I bought a NAPA IC64 coil in April 2004, list price $62.50 discounted to $40.00. NAPAonline.com lists IC14SB for a meager $17.99 (April 2007). When I needed one for my lawn tractor I found a John Deere AT10399 on-line for $14.95, and it works just as well in an MG. Maximum voltage output could be anywhere from 17,000 volts nominal with a small spark plug gap up to 55,000 volts with a large plug gap and high output coil. There will be far more part numbers that are not listed here, as I have not listed all of the auto manufacturers (missing Ford and GM and MG for instance)
AC-Delco
U515
Alfa Romeo
510897
British Leyland
UKC3555
BMW
12131-357-296
12131-359-637
Borg-Warner
E30M
E37
E40
Bosch (German)
00 012 (blue)
00 015 (blue)
00 019
00 021 (black)
00 044
Caterpillar
4M1467
7B4496
631196
Chrysler (MOPAR)
200574
200611
200691
924053
1626875
1658432
1658433
1688210
1843324
2095338
MD001800
MD001804
Clark
887408
2503976
Crane FireBall
PS20 (black)
PS40 (chrome)
Delco-Remy
1115032
1115033
1115043
1115046
1115048
1115052
1115056
1115057
1115058
1115060
1115061
1115062
1115064
1115065
1115066
1115068
1115072
Fiat
1078
4061050
4071394
4158493
4384184
Honda
30500-634-015
30500-634-671
International
368893-R91
368402-R91
368402-R92
395331-R91
395331-R92
396547-R92
396547-R93
3063671-R91
J.C.Whitney
ZX075527P
John Deere
AT10399
Lucas
80 5002
80 5012
80 5015
45020A
45074
45075
45166
45214
CL 1
CL 2
CL 71
CL 101
CL 102
DLB 101
DLJ 102
DLJ 203
Moss Motors
543-020 (screw in)
143-200 (Lucas sport coil)
NAPA
IC14
IC14SB
IC64
Niehoff (Advance Auto Parts)
AL178
DR180
WA752
Nissan (Datsun)
22433-14800
22433-14805
22433-14806
22433-14811
22433-14815
22433-14816
22433-14900
22433-14905
22433-31300
22433-31303
22433-58000
22433-78500
22433-78510
22433-79011
22433-79012
22433-L1110
22433-L1610
22433-L1611
22433-L6800
22433-L6801
Pertronix Flame Thrower
40501 (chrome, oil)
40511 (black, oil)
40611 (black, epoxy)
Prestolite
5-10
200691
CAS-4012-1
CAS-4110-1
Saab
8528328
8804783
Sorensen
GC-521
SC-1A
SC-1X
SC-27X
Standard-Hygrade
UC-15
UC-15X
UC-500-12
UF-3
Subaru
82988-2800
82988-4110
82988-4112
82988-6102
98136-0005
98136-0007
98251-1535
98251-35080
Toyota
90919-02002
90919-02004
90919-02007
90919-02008
90919-02013
90919-02014
90919-02015
90919-02016
90919-02019
90919-02020
90919-02026
90919-02027
90919-02030
90919-02031
90919-02043
90919-02107
Triumph
GDC106
UKC3555
Victoria British
8-288 (sport coil)
8-627 (screw lead)
8-285 push lead)
10-420 (Bosh blue)
10-421 (Bosh red)
10-538 (Flame Thrower black)
10-539 (Flame Thrower chrome)
Volkswagen/Audi
021 905 115A
043 905 115A
043 905 115B
043 905 115C
Volvo
35254
3638411-3
Wells
LU800
This 12-volt non-balasted ignition coil is compatible with the following applications:
AMC- 3154627; 3161081; 3170249; 3173687.
CATERPILLAR NUMBERS: 49884, 62611, 353805, 631196
CLARK NUMBERS: 722593, 881097, 887408, 940104, 940140, 1728993, 1800958, 2503976
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