You'll get there. I've done all of that stuff (several times for most of them.) I bought some thicker fel-pro valve cover gaskets last time. They are a lot more expensive but I was having an oil drip at the rear port side of my valve cover (think where we weight to surf) and figured it was worth beefing those up a bit. Now that I just replaced my tranny cooler I think the only part under my engine cover that is original is the transmission. Holy hell, I better knock on wood!!
Former owner of a 1987 Supra Saltare. Current owner of a Malibu 23LSV.