If you read my question again slowly, you may find I have been there already. I wouldn't bother anybody with an easy one like that.
No worries John, somebody might have a quick answer one day. Thanks for your valuable time.
Just can't find any more info but a previous post in the archives mentioning the suffix letter telling the application of the engine.
I have been driving this engine daily for 11 years now and it's history has always been a mystery.
It's probably the most reliable friend I ever had and it would be nice to one day know a little more about it's background.
One of the casting# website shows both high and low compression heads for this apparently car engine. Why I have not a clue.
Weird that the truck engine would use the higher compression head only.
Maybe a misprint and it's the other way around really - makes more sense to me.
