I saw your mention of the OHC 6 being much lighter and that was a factor in your decision to possibly build one. I don't know how much lighter that engine would be than a Pontiac V-8 with aluminum heads which is quite common now.
The OHC 6 has an iron block, iron head and a mile long crankshaft. I would check the weights to be sure. If weight is a major consideration, an aluminum block/head V-8 may be lighter yet and make more HP of course. Lots of decisions to make. A 400+ HP OHC 6 is going to be an expensive build. But really cool.
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