Quote:
Originally Posted by alanwoodieman
99 is for mercury T is truck so you may have a mercury engine that was in a truck. I have a 40 wagon and two 41 trucks all came with the 99 motor the big difference is the journal size on the crank, so pull the crank and check for numbers indicating a turning on the crank. also were there any numbers on the tops of the pistons? like 030/040/ these numbers would clue you into if the block was bored out
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Regular truck heads are 81t for that time.