Input shaft is different. You'll either need to find and swap in an input shaft from a V8 T5, or use a bushing/bearing in the crank to make up for the size difference.
Manual trannies don't have clutch's in them like an auto does (bands/clutch's), though I would make sure the synchro's are OK.
You'll also need to find a V8 bell housing for the tranny, the 4 cylinder bell housing will not fit on the 5.0 block.
So, at that point you might as well look for a real v8 T5 and sell off the 4 cylinder T5.
1994 2.3 XLT Turbo
Ranger Roller cam 2*R, T3, Gillis @ 20psi, 3in downpipe dynomax ultraflow, no cat, Large NPR, Turbo XS RFL BOV, LA2, Bob's big log header, Gutted/Rotated upper, Knifed lower, 65mm TB
'96 Expo 8.8, LS, Disk Brakes
245/45/17, Chrome SALEEN's
Getting over hauled!