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MKI and 5-main bearing

To: "'The MG List'" <mgs@autox.team.net>
Subject: MKI and 5-main bearing
From: "Brinkmann, Gerry" <brinkg@uf4124p01.BHeightsNJ.ncr.com>
Date: Mon Nov 18 09:49 EST 1996
Over the next couple of months I shall be rebuilding an MGB engine.   
However I have not decided yet if to rebuild a 5-main or a 3-main engine.   
I have several 3 and 5 main blocks so I can use either. The engine will   
be going in a MKI ('62) MGB and I want to use the 3-synchro gearbox,   
because I do not want to make any modifications to the body to get the   
4-synchro to fit.

Has anybody successfully fitted a 5-main engine to a 3-synchro gearbox ?

I know that the gearbox input shaft is small on the 3-synchro 'box and   
therefore I shall have to machine a spigot bush to fit the 5-main crank   
and the 3-synchro 'input shaft. But apart from that is there any reason I   
can NOT mate the two parts together ?

I will probably have to use the 3-main starter and therefore the 3-main   
flywheel/clutch, although I could change the bell housing and use the   
later starter/flywheel.

Any body done this before ?

thanks
gerry

PS - the lack of synchro in 1st gear does not bother me in the least. I   
have never found a need for synchro on 1st - comes from plenty of   
practice double-declutching.  

The following binary file has been uuencoded to ensure successful
transmission.  Use UUDECODE to extract.

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