The Canadian Buick Parts Catalogue for 1946-57 models printed in July, 1960 shows the 1998792 block to be used on all 52-55 models. No mention is made of the color.
The earliest reference to the 1998792 block I could find is in the March, 1954 Chevrolet Parts And Accessories catalog. It indicates the block has a red base. Usage is only on the '54 truck models. Another 4-term. block 1998756 is shown for passenger cars '40-54 (color not mentioned). By their '57 parts catalog, the 1998792 had superceded the other two blocks shown in '54.
So the red block was available from Delco-Remy for Buick to use by the time the '55 models were built. A Buick Parts List printed in '55 would show if the 1998792 was used or some earlier part number, possibly brown.
Last edited by TODD; 09-28-2017 at 02:33 AM.
Reason: Add attachment
What has been, can be again. (Bob Wills, 1942)