I installed fox body seats ('87-93) in my '67 coupe and am very happy with the extra leg room and roof clearance is the same as my stock seats. Not quite your size as I'm 6'1" and 205lbs. It doesn't feel like the forward seat area is any higher, less than an inch if it is.
I used the sliders that came with the '90 seats I picked up on Craigslist for $75 and drilled new holes to put grade 6 carriage bolts in with a ~1" wide plate steel spacer. Now my seat goes back farther than I even need it to.
http://i194.photobucket.com/albums/z...7incarside.jpg http://i194.photobucket.com/albums/z...lidersfull.jpg
Sorry the manage attachments button isn't responding for me.
I really like that the seats recline and slide smoothly, I hooked the spring up so they work as they did in the '90 and they have electric lumbar (haven't hooked it up yet).
I like the added safety of headrests ('67's top stopped at my shoulder blades - no support). 3 point belts will be next.
I'll be getting new seat covers from TMI stiched to appear as the originals (horizontal stiching, etc.) and to match my rear seats.
If the pics don't link PT/PM me and I'll email some.
Jon