tpis told me they built a 4.1" bore lt1 using a gm race block. does anybody know anything about this block?

 

I don't know what they are talking about but I have been down there many times. I know they have a bunch of billet blocks built up - this could be what they are talking about. Myron raced World Challege for several years and I would assume that is the 4.1 bore LT1 your talking about becuase it was a 431 Ci (?) LT1 if I recall right. Either way, monster cubes in a LT1.

 

actually its a 409cube motor (3.875 stroke, 4.1 bore)