So I have been getting exhaust out the breather at high rpm and did a compression check. Engine is an iron headed 440 in my '70 Challenger with about 10,000 miles on it. Test was done hot, at first anyway.

#1=170, 2=40(yes 40), 3=174, 4=15(yes 15), 5=169, 6=171, 7=185, 8=170.

Other than the exhaust out the breather, the car runs fine, no coolant in the oil, doesn't seem to be going through unusual amount of oil or coolant, but clearly something is up. The pamphlet with my tester says 2 adjacent cylinders down more than 20 psi from the others (2&4) is probably a head gasket. Any advice is appreciated