Water in oil, car hasn't been driving in fifteen years, Started car and let warm up. Found oil foamy and discolored. Changed oil added water and restarted (very hard to start). Water oil mix sprayed through front seal on timing gear cover. Oil in pan at double normal level(ran less than 5 minutes - never reached operating temp.) Pulled spark plugs - all showed signs of water - car smoked from exhaust, blue, moderate. Has stock GM alum high rise intake, 194 heads, 10.5: 1 compression, RV cam. I hope its just head gaskets but need some troubleshooting/diagnostic tips. If it's a crack in something how can I find it. Can I pressurize the cooling system - somehow