TWO PIECE REAR MAIN OIL SEALS
3.76" STROKE used on '65-'90 Mark IV 366T, 396, 402, 427 or 427T

CASTING#	SIZE	TYPE	STROKE. NOTES
6223	396,402,427	forged	1053 steel
7115	396,402,427	forged	nitrided, cross-drilled, 5140 steel
3804816	396,402,427	cast
3856223	396	forged
3863114	402
3863144	396,402
3874874	396,402
3879621	427	forged
3882841	396	forged	cross drilled, nitrided
3882842	427	forged	cross drilled, nitrided
3882847
3882848
3882849	427	forged
3887114	396	forged	nitrided, 5140 steel
3904815	396,402	cast	nodular iron
3941180
3942411
3965746		forged	semi finished
3993804			raw, 5140 steel

ONE PIECE REAR MAIN OIL SEALS
3.76" STROKE used on '91-up Gen.V and Gen. VI 366T, 427T

10114186	427T	forged	1053 steel
10114187	366T	cast

TWO PIECE REAR MAIN OIL SEALS
4.00" STROKE used on '70-90 Mark IV 454 or Mark IV 502

3520	454	forged	cross-drilled, 1053 steel
3521	454,502	forged	cross-drilled, 5140 steel
3524	454	forged
7416	454,502	forged	cross-drilled, 1053 steel
7463	454	forged
336782	454	cast
353039	454	cast
353638	454
359730	454
3962523	454	forged
3963523	454
3963524	454	forged
3967416	454	forged
3967463	454	forged
3975945	454
3963521	454	forged	cross drilled, 5140 steel
3965753		forged	semi finished, 5140 steel
3975495	454
3993878	454	forged
10051169	454	forged	raw casting

ONE PIECE REAR MAIN OIL SEALS
4.00" STROKE used on '91-up Gen.V and VI 454 or 502

10114188	454	cast
14097044	454,502	forged	1053 steel

 
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