I need help finding new exhaust and intake seals, it seams that these may be somwhat universal but not entirely sure. When I look them up I get different size perhaps the exhaust and intake are different diameters. I’m a diy guy who’* a tight wad. This motor has 230k miles on it so may need new springs as well. I’m not intending on removing these heads off the truck, simply pressuring to 20 psi though spark plug, with valve sealed. Why am I sure the seals are leaking because several valves have tablespoon of oil sitting on them after removing & cleaning the intake. Stock motor and new style pvc valve already fixed. Truck has been sitting up for 2 months when I tore it open.

About 1 quart every 600-1000 miles, rear main leaks also but who knows how much it leaks, after being parked few days has about 10 or so drops on the ground or about a silver dollars worth

5-7 days