When driving my fuel injected 427 Fontana yesterday it felt a little rough to me like maybe not firing on all cylinders. I was going to spot check a few plugs to see what they looked like but then I googled about plugs and aluminum engine and saw a few sources saying plugs should always be torqued to various specific strengths depending on type of plugs (tapered or gasket), the type of threads and whether you have iron or aluminum engine. When I had my stock iron 351 I never thought twice about just pulling the plugs and replacing with ballpark "snug" strength. So I wonder does anyone really torque their plugs? The info I found shows minimal tightening strength numbers which would require a small torque setting and thus somewhat expensive wrench. Just wondering if torqueing is really necessary?
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