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Old Tee,
I was a firm believer of using the Anerobic Locktite products on cases and cam towers because that's what the factory used. One of my racing buddys that I taught to rebuild his engine insisted on using the 730 RTV because Jerry Woods shop uses it. I couldn't be happier with the 730 RTV. I have since used it on my engine when I rebuilt it. I think it does a great job and to me is easier to control how much to use and where the stuff gets squeezed out than the Locktite. It seems to have a different feel when cured than the normal silicon rubber.
It is expensive and so I wouldn't buy it for cylinder base application. I would use a non curing sealant like Curil T or non hardening black permatex (I use this). I also don't like the idea of using a hardening sealant on the base gaskets because it takes hours to get the top end assembled and torque the headstuds. This causes the sealant to cure (even 730 RTV) before the cylinders are fully seated.
-Andy
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72 Carrera RS replica, Spec 911 racer
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