On Thu, May 21, 2009 at 11:56 PM, Randall <tr3driver@ca.rr.com> wrote:
> The manifold is relatively soft aluminum, so easy to drill and tap for
> another fitting. I've added several ports to my TR3A.
>
And on the 4A I think there may be an angled boss on the manifold that I
have often seen used as the logical location for tapping in. It's certainly
there and unused on a TR4 manifold.
Geo
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