Re: Super A pistons and other Q's

Posted by Hugh MacKay on June 17, 2007 at 15:10:55 from (209.226.247.150):

In Reply to: Super A pistons and other Q's posted by Andrew Z on June 17, 2007 at 14:38:10:

Andrew: If your 53 Super A has block part number 354898 R1, which it should have to be original. That is the same block as SC and it will accept 3-1/8" sleeves and pistons without modification. You can even install 3-1/4" sleeves and pistons.

After serial number 310300 on SA and all SC used that same block. The 3" bore was retained on the SA by using thicker wall sleeves. I expect it was more economical for IH to produce different sleeves and pistons than cast two separate blocks. By 1954 and serial number 356001, IH had upgraded a few items on the SA power train, and from there on SA became known as SA1 with C-123 engine, water pump and larger radiator. Some of those power train upgrades included Rockford clutch, heavier final drives with different brakes.

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