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Old 09-08-2015, 08:50 PM
keith k's Avatar
keith k keith k is offline
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Join Date: Feb 2005
Location: SE Michigan
Posts: 3,566
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Quote:
Originally Posted by indyta1989 View Post
The numbers matching block looks like it was factory double stamped both YS and YZ over the S (see photos). I suspect it is a standard YS Formula 400. I will leave the PHS up to the new owner to determine if it is indeed a YZ.
The heads being 13s is another indicator of a YS engine. A factory YZ would have had 12s.

Neat car - good luck with the sale!

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keith k
70 Trans Am RA III / T400 / Lucerne Blue / Bright Blue
70 Trans Am RA III / M20 / Lucerne Blue / Sandalwood
70 Formula RA III / M21 / Lucerne Blue / Bright Blue