[Healeys] missing at high rpm

[S and T Miller]

Hi Max, did it do this before the work you did?  Tell us everything you did/
changed?

Message: 11
Date: Mon, 4 Apr 2011 18:42:55 -0700 (PDT)
From: Maurice Maxwell <maxandreb1 at yahoo.com>
Subject: [Healeys] missing at high rpm
To: healeys at autox.team.net
Message-ID: <380197.99389.qm at web161715.mail.bf1.yahoo.com>
Content-Type: text/plain; charset="us-ascii"

After replacing a head gasket and all of the other gaskets in the kit and
having
the head rebuilt. I tuned the car and it drove around town just fine. Steady
idle, smooth power. However, on the highway, there was a serious misfiring at
about 4000 rpm when the throttle was fully depressed. When the gas pedal was
slightly released the smooth performance returned and the car continued to
accelerate on to 5000 rpm. I find this to be strange and I need help figuring
this out. The car did this in 3rd, 3rd o.d., 4th, and 4th o.d. It did
accelerate on to 5000 rpm in each gear when the pedal was not quite on the
floor.

Thanks for your help in advance,

Max
1961 BT7 MkI