After a guy I work with came to watch the racing on Saturday his heart got set on the good old datto's... today he purchased a MINT condition 1979 Datto 1800J SSS which I think was fairly unique to SA as I dont pick up much by google,,,

Has a semi tired L18 in it with the twin SU's, motor runs like a clock but has some blowby after her 180 000km's.

I am gong to help him spice it up a touch to get her to perform nice in Marque class so I have a right hand man to help me fend off the Alfa's but I have never paid any attention at all the the L series motor so here I am asking for some help...

Nothing crazy needed, but I will change pistons and obviously do head work while I do the motor, anyone know of some slightly higher comp pistons the swap in easy? also what is a good size cam if one keeps the SU's (they work 100% so it would be a bit sad to loose them).

Last of all, what sort of power gains do the L18's make with a nice exhaust manifold, exhaust, cam, head work, bump in comp etc?

And yes the first thing we do will be to put new springs in and raize it a bit!

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