I don't think this is a 6cyl or y-block.
I put a custom bent Hurst shifter on it. Just the stick. Tranny was in the truck when I got it but all he changed was tranny and a Wilcap adapter on the stock bell.
http://www.wilcap.com/
He told me it's a stock 1966 352 bell, clutch, t/o bearing, pressure plate and the speedo hooked up (a different driven gear was needed). I repeat, I didn't do the swap. It is a blast to drive. 18mpg at 75 going down the interstate at 2100RPM. I have 3.25 gears. Also clears bucket seats fine. Strongly recommended.
There are different input shaft lengths, shifter locations, mounting angles (Camaro rotates some of theirs 15* or so). You want a post 89 Mustang 5.0 tranny. Get too new and the input shaft is too long. Check on the H.A.M.B., there is a complete listing of all T-5's, tag numbers, ratios, lengths, etc. It's the ultimate T-5 guide.
SPark

1932 Ford 5 window coupe. 302/C4
1962 8V-390/C6 Unibody Short Bed Soon to be Big Window - The Lincoln that never was
2013 F150 Super Crew Eco Boost 4x4
2015 Ford Edge for the little lady, because she said so!
2007 Mustang GT, 4.6-3V/5 Speed. Only 8680 miles on the clock.
More toys, I need more toys!!!