Re: Suburban K20 1986 Silverado
nope I think i have the older block,diff from you....dip on drivers
dosn't the mark change,by the block style
but i havn't seen my timing light in a while,to see where it is since i've been twisting the dist
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John
1978 GMCJimmy4X4-350/203
1979 GMCJimmy4X2-305/350
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