Hi,
I did this job a few years ago.
The manifolds bolt right up.
I used the 230 camshaft and bearings.
No issues with fueling either.
Straight forward one for one exchange.
I also fitted the water to oil heat exchanger from the 250 engine. The hardest part was removing the plug on the engine block where the water return line adaptor fits.
Hope this helps.
Naj
P.S.
glenn,
The same head gasket is used on the 230 and 250. All holes match up etc...