Yeah they would be fine. One criticism of the old standard Maniflow med bore LCB is the centre pipe's flange is never flat. They bend after welding and they ship them like that. If you don't ensure they are flat (by grinding or filing) before fitting, the gaskets burn out.
I bolt them (with the Y piece on) to an old head (no gasket) on the floor, and check around the flange with a .002" feeler. Grind/file until it won't go in anywhere.

Cast flanges (with the welds away from the flange) like the one in your link don't give this problem.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

I have 1-7/8" to 2"muffler with 2" tailpipe. Fairly effective

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the world is a book, and those who do not travel read only a page
66 Mini Minor sponsored by http://www.lifeonthehedge.com.au/ The Dog Harness Specialists
It was a pleasure ausmini. I'll miss all you misfits and reprobates