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Does anyone know how to tell them apart? I assume the H-beam weigh less than the A-beam? I have an unknown set. Purchased used in 2004 for $999.00. Also are size clearances the same within the motor? What I mean is visually, are they identical?
 

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The H beams are flat and smooth while the A beams have a grooved oval in it.
 

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Visually, no they are not identical. Cosmetically speaking, the H-beam looks like the letter H if you were to cut it in half from a cross sectional view. They're also stronger but heavier than the A-beam rods. If you got them for $999, chances are they are A-beam considering the H-beams are roughly $600 more.

Wow, 2004? That's a long time ago. Collect dust much? Hehe.
 

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Connecting rods don't fail from power. There are other factors that affect it.
 

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Connecting rods don't fail from power. There are other factors that affect it.
+1

From Carrillo Rod Tech:

Carrillo is often asked about general horsepower ratings for the various designs of its connecting rods. Unfortunately, this cannot be answered in a simple way.
The most relevant rod design parameters are Inertia forces (a function of engine
speed, crank train geometry and assembly weights) and Cylinder firing pressure
(tuning, fuel, boost, etc.)

Through increased engine speed, displacement, firing pressure or a combination
thereof, horsepower is gained. However, though the various changes in the
cycle, the demand on the rods varies greatly. Moreover, extreme dynamic loads
on the drive train such as intermittently free spinning wheels or propellers (Hill
Climb races, Off-Shore boat races) should be considered the when making the
right choice of rod.

Based on our experience combined with our analysis methods we like to provide
you with our best suggestion for your specific application.
 
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