Description:

This rotating assembly features a fully counterweight Callies Compstar crank with either a stock 3.625 inch stroke or 4.000 inch stroke with matching Compstar H-beam rods.  The Manley Platinum Series, flat-top pistons with 4.030 inch bore are ideal for naturally aspirated applications.  For an additional charge, this set can be computer balanced on our Fentech balancer to +/- 1 gram. The stock stroke and 30-over pistons yield a displacement of 370 cubic inches.  The 4.000 inch crank brings displacement up to 408 cubic inches.  The rods in this combination are Callies Compstar H-beams with stock length and journal sizes of 6.125 and 2.100 inches respectively.

The Callies, forged, 8 counter-weighted crank is a very large step up.  The additional counterweights reduce harmonic vibration and increase the stiffness of the crank by about 25%.   It's increased stiffness and reduced harmonics minimize flexing thereby protecting the block, bearings and rods from excessive wear and fatigue.  Get more details about this crankshaft in the video below.

This combination includes Manley Extreme Duty Platinum flat-top pistons. The pistons are made from 2168 alloy with wrist pins of 9310 alloy. The forgings are domestic and these parts are loaded with features. 

These rotating assemblies can also be ordered as short blocks. These are quick-ship items.  We usually have one either on the floor fully assembled, or have fully machined parts ready to assemble.  Call us at 815-725-2727 with any questions or to place your order.

Want to hear from someone with one of our 6.0L short blocks in their car?  Here's David Ankin, star of the History Channel TV show ToyMakerz: 

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