I have a 78 f-150 with a 300 straight 6, i am changing it over to a 5.0 out of a 91 f-150. The 78 has a 4 speed with granny low as we call it, i have just gotten a new flywheel, and i was wondering if the clutch, pressure plate, and throw out bearing assembly from the 300 will bolt up to the 302 fly wheel. I wouldn't worry about it but i just bought the assembly for the 300 about a month ago then the motor blew.

 

Hi there...
I am not a machanic...but I have done this sort of engine swap myself...
I have a 77 F-150 4x4 with the manual 4 speed (granny first) which had the V-8 351 M engine in it stock...after the 351 M blew up with only 78,000 miles on it...I put a 1986' 300 in-line 6 cyl in the truck...I of course had to change the motor mount towers..and also the bell housing as well..
I went and bought a used 302 bell housing to bolt up to the 300 in-line six...
Sooo...I would say going from a 300 inline six cylinder...to a 302 v-8...would be no problem..
Just have to get different motor mount towers..

Not sure if the clutch assembly will be the same...I just bought all new clutch, flywheel, pressure plate for the inline six when I did the swap..

The 302 V-8 bell housing....and 300 inline six bell housing are the same...(for my 77 truck)
Chances are that yours will also be the same..
After having the inline six...I am also thinking about swaping that out to another V-8 again...I will never have another ......
351 M though.....everyone I have known to have this motor has lost oil pressure slowly over a corse of time, and then blown them up...

I hope this helped ya..
Good luck with the swap...