I've been doing lots of searching here and the internet in general, but other than hearing the "it won't work without lots of work" type comments I haven't found anything that has been done to make one fit.

351W engine.

If I have to drastically modify the tunnel or firewall so be it, but I am hoping to get some direction before I start. The car is already drastically modified so a little more won't hurt anything but my wallet. 

Thanks,
Russ

A good built C4 will work , even if the 351 pulls over500 HP it will live , and much cheaper in the long run , one you can use the stock shifter if you like , it fits the tunnel , it’s also the same gear ratio as the heavy c6 , standard is nice also , T5 are kind of
cheep but almost the same money , well at least where I live ,