[Steve Shauger]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 1967Z28</div><div class="ubbcode-body">Grand Sport engine photo, sent to me by former Penske driver Craig Fisher.

I've only ever heard of them in the 377&quot; size but it certainly is possible Penske ran something different. </div></div>

My understanding was that Bill also thought it was a 377ci engine; but upon rebuilding it the crank stroke was determined to be 3.622 not 3.75. The bore was 4 inches .

Here's an excerpt from the Grandsport book which quotes Bill. Perhaps they used both displacements in different cars. I know he wasn't pleased later on when he had to install a big block in the car. He loved the SBC.

&quot;Corvette Grand Sport&quot; book by Friedman and Paddok on page 135 a comment by Bill Scott, one of Roger Penske's most trusted mechanics, that stated, &quot;I ended up building an engine, it was a 364 ci engine, not a 377 ci as many people believe.&quot; That statement was in reference to the 005 Grand Sport being prepared for the 1965 Sebring race. The famous 377 ci small block Grand Sport engine had a 4&quot; bore and supposedly a 3.75&quot; stroke which gave it 377 ci. According to Bill Scott's statement the correct engine size was not 377 ci but had the same bore as the LS2 engine (4.00&quot and stroke (3.622&quot which results in 364 ci.&quot;