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#885740 07/16/22 10:51 pm
Joined: Nov 2004
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pigpen Offline OP
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Ignorance is bliss and asking questions usually isn't too costly.
I have a nasty habit of building bikes from bits. I have located a MAC bottom end and was wondering if it is possible to use a Viper head and barrel on it? The bottom end dates from around 1953.
Tom

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Anything is possible, question becomes is it worth the effort. A MAC engine can be made to run really well with a lot less effort than what you are considering. However it is interesting to note the first barrels used on Vipers were modified alloy MAC items. I think the spacing of the cylinder / head hold down studs for a MAC is closer than a Viper so becomes the limiting factor in boring out MAC cases to accommodate a Viper barrel.


Laurence Luce
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pigpen Offline OP
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Fantastic! Just the information I needed before making a big mistake.
Thanks for the input.


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