Well to start off...
There is nothing about you doing this that makes sense....but thats kinda cool
Your money could be spent better elsewhere, but it were going to race it then I am sure you would.
You obviously have researched this and are keen on doing it, so I say good luck to you.
You WILL have problems and plenty will go wrong....there is no doubt, i had problems going from an rb20 to an rb25 and still sorting out issues
It WILL cost more then what you planned, it always does no matter how in depth you have gone into it.
You WILL get better bang for bucks from a turbo...but you aren't after that.
Did I mention good luck with it and that it is a crazy idea!!
Will be interesting to see in the flesh when it's done...as long as you don't polish everything under the bonnet or cover everything in carbon fibre.
Again good luck and keeps us posted or blogged, should be good to see what you can fit into the engine bay of an R34.
Cheers Ro.