never use teflon ever unless its for coolent haha
if you bought a cheap dp the guess wut ur gona have to cut and weld it to where you need it to be ..... sorry that just wut happens when you buy cheap stuff thats not made specifically for your setup.
and for your feed line you could go with a threaded restrector plate that will bolt up to the 2 holes where the feed line goes in and it should come with a threaded -3an port
o and just go to honda dont go the cheap rout and buy a valve cover gasket set it will come with all new seals for the valvecover that will fix your oil leak