When people referto removing the base gasket what is a good sealent to use in its place. Can't just take it out and bolt it straight on can you? I'm pretty new to this and would like to buy the best gasket sealant that I can. And just how mch can I expext from such a mod. Also I have access to a full machine shop and can operate most of the machinery comfortably. Are pop up pistons worth while.