Best clubman for TS1

What is the best clubman exhaust /carb for a standard TS1? Just looking like most for 60 cruising plus a little bit extra.
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https://www.ilambretta.co.uk/forum/
https://www.ilambretta.co.uk/forum/viewtopic.php?f=7&t=10520
Strummer10 wrote:Just ditching my BGM clubman due to excessive heat build up on the TS 1 as gases get trapped, now going for expansion as too much hassle, but the Goro's might be better