Chevrolet Tall Deck BBC ?

John Beasaw III · 11-28-2007, 08:30 PM

I was just wondering what the max bore would be for a Chevy tall deck bbc? The engine is a 427 TD and is in good shape. Thinking of building it into a bracket engine. I know about the intake and header issues. Also what stroke crank can i install in this motor.

Thanks

John

Alan Roehrich · 11-28-2007, 10:51 PM

Provided it passes a sonic test, you can go 0.125" over, or 4.375".

I have put as much as a 4.5" stroke in one. It is very tight, and you have to be careful, grinding for rod clearance can break into the main oil gallery.

For drag racing I always pour the block up to the water pump holes.

11-28-2007, 08:30 PM	#1
John Beasaw III Member Join Date: Jan 2002 Location: Marion, N.Y. Posts: 126 Likes: 0 Liked 2 Times in 2 Posts	Chevrolet Tall Deck BBC ? I was just wondering what the max bore would be for a Chevy tall deck bbc? The engine is a 427 TD and is in good shape. Thinking of building it into a bracket engine. I know about the intake and header issues. Also what stroke crank can i install in this motor. Thanks John

11-28-2007, 10:51 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,107 Likes: 1,564 Liked 1,796 Times in 409 Posts	Re: Chevrolet Tall Deck BBC ? Provided it passes a sonic test, you can go 0.125" over, or 4.375". I have put as much as a 4.5" stroke in one. It is very tight, and you have to be careful, grinding for rod clearance can break into the main oil gallery. For drag racing I always pour the block up to the water pump holes. __________________ Alan Roehrich 212A G/S