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Rick Shirey · 11-07-2009, 09:00 PM

I run a 4.155 bore with a 3.5 stroke and switched to a Dart Little M block after years of using the stock 400 blocks. My machinst tried to talk me into going with the Dart block years before switching but I resisted because of the expense. But when you consider the expense of preparing a stock block it does make sense to go with a block that is made of better material and engineering. The leakdowns have been more consistant and time between freshens has also lengthened.

11-07-2009, 09:00 PM	#2
Rick Shirey Junior Member Join Date: Apr 2003 Posts: 53 Likes: 0 Liked 0 Times in 0 Posts	Re: Chevy Small Block I run a 4.155 bore with a 3.5 stroke and switched to a Dart Little M block after years of using the stock 400 blocks. My machinst tried to talk me into going with the Dart block years before switching but I resisted because of the expense. But when you consider the expense of preparing a stock block it does make sense to go with a block that is made of better material and engineering. The leakdowns have been more consistant and time between freshens has also lengthened.