Diagrams:

Distributors
(click to enlarge)

A2420	58-61	BUSHING - vacuum advance stem	1.25
A2594	55-61	CAP - distributor (1955-57 all engines, 1957-61 dual point distributor #1110891), GM #1917247, w/Delco logo NOS	89.95
A2544	55-61	CAP - distributor (1955-57 all engines, 1957-61 dual point, 1110891	25.85
A2561	57-61	CLAMP (SOLID) "A" shaped & BOLT - distributor hold-down	13.95
B2512	60-62	CLAMP (WIRE) & BOLT - distributor hold-down	17.50
A2438	55-61	CLIP & RETAINER KIT - distributor cap, #'s 1110872, 1110879 & 1110891 / 2 required per distributor, each	11.85
A2577	55-61	CONDENSER - distributor	10.95
A2434	55	DISTRIBUTOR - GM #1110855 (recond.)	599.95
A2470	56E	DISTRIBUTOR - GM #1110872 dual point w/dated tag, RESTORED	424.95
A2471	56L	DISTRIBUTOR - GM #1110879 dual point w/dated tag, RESTORED	424.95
A2558O	57-61	DISTRIBUTOR - rebuilt, dual point #1110891 - includes new points, condenser, bushings (as required), cap w/rotor, detailing & dated tag	324.95
A2558	57-61	DISTRIBUTOR - rebuilt, dual point #1110891 w/exchange - includes new points, condenser, bushings (as required), cap w/rotor & detailing. dated tags available at an additional cost [CORE CHARGE $175.00]	189.95
A9917	55-62	DISTRIBUTOR LEAD/WIRE - distributor to coil	13.95
A2547	55-61	GASKET - distributor to intake	2.95
A2590	55-61	GEAR - lower distributor drive	24.95
A2466	55-61	GROMMET - distributor lead, 1955-57 all, 1958-61 1110891 models, square	5.95
A2581	55-61	GROMMET - distributor lead wire/rubber, round, 1110890 & 1110946 models	4.25
A2382	55-61	ID TAG - with rivets, metal, black 55-56 all, 57-61 with dual point, stamped w/correct part number and date "as original"	26.50
A2436	56-61	JUMPER - wire lead/between points, distributors #1110872, 1110879 & 1110891	12.95
A2636	55-61	LUBRICANT - point opening cam	11.25
A2439	56-61	LUBRICATION TUBE - dual point distributor w/wick & cap - screws into distributor	45.50
A0613	55-61	PIN / RETAINER - lower distributor gear	1.00
A2511	55	POINTS - distributor Delco, GM #1938340, w/logo, NOS	18.95
A2513	56-61	POINTS - distributor, all 56-57 & 56-61 w/1110891, GM #1938330, NOS, (2 req. ea)	32.65
A2582	56-61	POINTS - distributor/dual point (2 require, ea. )	29.95
A2510	55-61	REBUILD SERVICE - dual point distributor, 220/245/270hp (includes: 2 sets new points, condenser, rotor & cap- bushings if required)	179.95
A2409	55-61	RETAINER/ROLL PIN - lower distributor drive gear shaft	1.50
A2527	55-61	RIVET SET - Delco distributor tag (pr)	2.85
A2585	55	ROTOR - distributor NOS DELCO #1917249	12.95
A2583	55-61	ROTOR - distributor, 55-57 all, 57-61 dual point	7.95
A2597	55-61	ROTOR - distributor, 56-57 1x4, 56-61 dual point, Delco #1927393 / D407 w/logo, NOS	12.95
A0617	55-62	SCREW SET - ignition points	1.00
A2553	55-61	SHIM PACK - between housing & bottom gear (4 pc)	14.95
A0614	56-61	TUBE - w/cap wick-oil fill	53.95
A2544K	56-61	TUNE UP KIT - distributor, cap, rotor, condenser & 2 sets of points/ALL WITH DUAL POINTS	82.45