I've tried 3... 2 - 180's and this 160. The block was a .030 bore and I'm using a rotary kit from Butler (new everything - pistons, connecting rods, crank, etc).

* New Crank 4" Stroke
* 3.25" Main (428-455 blocks) or 3" main (389-400 blocks)
* 3" Main has 2.200 rod journals
o 6.635-6.700-6.800 4340 forged H-Beam Bushed rods
*3.25" Main has 2.250 rod journals
o 6.625 4340 forged H-Beam Bushed rods
* Ross Pistons
*Pin Fitted
* Total Seal Classic Race Rings
* FM/CL Main & Rod Bearings
* Balanced Internally

I'm using a MEL-SPC-8 cam and an Edlebrock Peformer intake.

I'm using a set of 6X heads off a '79 400

My water pump came from Butler as well and is the 11-Bolt 1969 1/2-77 Pontiac Hi-Volume Aluminum Water Pump-FlowKooler.

I'm using a Portell radiator/fan assembly with a shroud http://www.portellradiator.com/default.php