opinions welcome on build.

justinp61 said

I don't know why guys are scared of long strokes, I've had a 4" and have a 4.125". Both revved quick and made good power. I ran a 6.125" rod with the 4" crank and have a 6.200" rod in the 4.125" engine. The 4.125" engine made peak hp at 6750.

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Depends on the heads and what you think a good power curve looks like.

By today's standards, 6750 is barely off idle. I remember when the 632 became all the rage. Most were shifted at 6000-6200. Today, 8000 is nothing.

If we are talking drag race engines, RPM is king.

Edit: on the street and in limited traction situations I can make the argument all day long for the shorter stroke and more RPM.