Quote:
Originally Posted by simon drabble
so it is possible to have a Mk111 with MGA engine and a later chassis which is not like a shopping trolley to drive (not my description but someone who had one!) and it still be pre 63...
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The car would have to run without a limited slip diff, use 4.5" rims and have a slightly narrower track than the post-63 cars but, yes, it should still be an OK drive. The chassis would be the same i.e. a huge improvement over the Mk2/2a arrangement. The engine would have to use the slightly smaller 40 DCOE Webers rather than the 45 DCOEs on the MkIII 1800 but it would be allowed to run the alloy crossflow head, just like the 1962 Le Mans cars.
Attached is a sheet which, amongst other data, has a summary of the key differences between the various Grantura homologations. It came from quite a few years ago as can be seen by the typeface!