J13 and there is a E1. However I saw a E1 at a wreckers
a year ago and told someone at crankshaft rebuilders
then as he had a friend with rallye 1000 a10 supposedly
and was looking for a stroker crank.
It surprised me to see such an engine and its listed here
http://en.wikipedia.org/wiki/Nissan_E_engine

with 71mm stroke and 76mm bores youd get 1288cc !!!!
enough to frighten many cars in that light body.

Are you allowed to change carburetion and exhaust?

Quote:

Yes, I've got twin 40mm weber side draughts and "extractors" (whatever the technical term is).

I have to use the original block and head. They can be modified by removal of metal but not addition. Internals are free thus the possible crankshaft change.

Mark