79 f-250 300 swap to 351M

awhale · Feb 18, 2008

Ive bolted the 351M to my 4speed and the motor mounts on the frame dont match from my 300 and the motor is hitting the throttle cable on the fire wall i was going make new mounts on the frame till I found the problem on the fire wall My question is do I need to move the tranny foward to cleare because it is still bolted in the original location.Thanks for any help !!!

bigwhitebus · Feb 27, 2008

awhale said:
Ive bolted the 351M to my 4speed and the motor mounts on the frame dont match from my 300 and the motor is hitting the throttle cable on the fire wall i was going make new mounts on the frame till I found the problem on the fire wall My question is do I need to move the tranny foward to cleare because it is still bolted in the original location.Thanks for any help !!!

some trans crossmembers will bolt in front or back try turning th crossmember sround see if that don"t move you twords the frontseveral "s.

highboy73 · Feb 27, 2008

it's the frame mounts.the 300 and v-8's have differant"towers"

bigwhitebus · Feb 29, 2008

highboy73 said:
it's the frame mounts.the 300 and v-8's have differant"towers"

high boy is right frame mounts are different but you need to make sure the cross member in the right place and that will / should fix the firewall problem.

highboy73 · Mar 3, 2008

the 300 frame mounts are closer together and up a little higher.thee cross member is kinda hard to get wrong.you may start out wrong but before you get far things won't fit.

bigwhitebus · Mar 4, 2008

highboy73 said:
the 300 frame mounts are closer together and up a little higher.thee cross member is kinda hard to get wrong.you may start out wrong but before you get far things won't fit.

I dont really know on a haft ton but on a 3/4ton it doesnt efect much at all other than the motor mount dont line up. I have seen this first hand. Well I take that back im dealing with auto not standard trans. It will block off more pan bolts auto sandard just dont know.

highboy73 · Mar 4, 2008

the cross member has alot of parts to be all together.if you put one thing on wrong you won't get all the other parts on.I have found out thru trail and error.same with the mounts.they just bolt in.go to a bone yard.

bigwhitebus · Mar 5, 2008

highboy73 said:
the cross member has alot of parts to be all together.if you put one thing on wrong you won't get all the other parts on.I have found out thru trail and error.same with the mounts.they just bolt in.go to a bone yard.

This thread has went about 2 post to many your right I'm wrong end of thread on my part!