The mid 80s ford t5 from a V8 mustang fits perfectly in a 240 and the shifter is in the center of the hole. The V6 mustang box works too with an input shaft swap and front bearing cover trim/swap. I've used one from a '94 mustang and an '01 or '02 mustang. tailshaft housing is same as the V8 one from the mid 80s that the adapter plate was original designed for. so the V6 trans ends up dimensionally the same.
I would not do that. Lawrence is a good guy but there's a bit of turmoil surround his personal life and his business and it might not be a good time to order parts with him. As for advice, absolutely, he knows his stuff.
I've had good luck using a Clutchnet pressure plate and clutchnet disc. There are a number of discs you can order in either the 215mm/8.5" or 228mm/9" size that will work with a stock pressure plate too. Or you can use a stock organic ford disc and an aftermarket stronger pressure plate. We did that in our lemons car to keep costs down (complete 4cyl Mustang clutch kit was only $60 and we used the disc with a used spec or clutchnet PP, holds 14psi from a b230f/60trim no problem).
Here's my parts list and prices. You can do it cheaper. I did it a LOT cheaper in our lemons car. Less than half, but I had to find deals and cut corners.
http://forums.turbobricks.com/showthread.php?p=3365636&#post3365636
Scroll up to see my ghetto trans mount solution that was cheap, easy, and required no welding/fabrication. Has worked fine on my autocross car that way.