3.5 Carb Missfire

I bought a 1986 RR with 3.5 Carb engine.

I have had the compression checked and found it down on cylinder 6 so off with the heads and grind in the valves.
Re assembled and still has the missfire.
Next a Leak detection showing leak on 6.

Could this be a cam or lifter problem rather than ring wear?

The cylinders showed little wear when the heads were off.

The car is in great condition so I am keen to sort it, I have also considered putting a tuned unit in with a Holley carb has anybody experiance of this ?

John

try putting oil down the bores, if the compression goes up then its the rings.

does it pop back though the carb then defo cam and followers

Thanks for the help.

If the cam or lifters were the problem would the engine be noisy.i.e.top end tapping?

John
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