my new frankenstien (slightly off topic)

i bought another 87 lx w/ a t5, 2.3 for $150.00. the motor is blown and the tranny is useless. i have a 3.8 with a c-4 attached, 2bbl carb. i know this will go in this stang, but do i need to switch motor mounts or will the 2.3 mm.'s fit. did this swap in an 86 lx 2 years ago but took a 3.8 out and slid another in. took the 2.3 out of my other 87 lx and will put the new motor in tonight. so far no vein busting on this swap yet. thanks for the input

this motor and tranny are out of an ltd. this will be a street car(commuter) for my wife when i do the heater core on her crown vic.(big job) anyway the motor mounts will work from a 86 fox body, but they didnt work from the ltd. but thats all i needed. what is the size difference compared to a t-5 and a c-4? this is for driveshaft only. have not checked yet its been raining for a couple of days.