these are the results of a leak down test done recently on a 1969 427/400 3963512 block

1 3 5 7
35% 18% 16% 23%


2 4 6 8
18% 43% 33% 30%

What's it look like the problem may be? The engine was running great before the test was done. Good oil pressure, ran fairly cool, started up easily, but noticed a little smoke from the R exhaust on startup, that disappeared after 30 seconds.