Quote: Simple stuff like the tach and speedo can be a pita.
You can get adapters to run them....I just did for an LS1 swap into an early car. A tach adaptor from Dakota Digital (that will work on 10 cylinder engine signals as well IIRC) and a electronic to mechanical speedo convertor that does the trick as well
Getting the gauges to work was alot simplier in my swap than building headers from scratch was (and having to do 2 more of them for a 10 cylinder would be even more fun I can imagine )
(and having to do 2 more of them for a 10 cylinder would be even more fun I can imagine 
)