55.2-59 Firewall dimensions

[_Ogre]

Originally Posted by regan56

I don’t have my cab near me so I’m going to try and mock a firewall to give me some perspective on how close the engine can/will be.

i wouldn't do it.

the engine needs to be close and at a certain height to work well. i think you'd be stabbing in the dark, even with precise measurements. get your cab on rubber mounts on your frame, even then you should have the front sheet metal on to get the cab location right

[dsraven]

I don’t have my cab near me so I’m going to try and mock a firewall to give me some perspective on how close the engine can/will be.
ogre: I wouldn't do it

thats kinda what I meant when I posted the link for adjusting gaps and using the driver's side mount as a cab pivot. unless you are using the original engine mounts then you don't really know exactly where the engine will sit, in comparison to the factory location, so you can't know how the new location will affect the fitment around the firewall, floor, etc. since the cab and other front sheet metal parts will possibly need to be shifted around to get the gaps and fitment right it is gonna be really hard to say if there will be interference when the parts get assembled all at the same time.
I would say if you can get the cab and front clip sheet metal then it may be worthwhile to do that and assemble the parts. then slip the engine and trans in place to get the mock up done.
thats just my opinion. it's your truck so you do what you think is best.

[_Ogre]

Originally Posted by dsraven

unless you are using the original engine mounts then you don't really know exactly where the engine will sit,

this is the best idea and the method i used even with my cab on the frame.
truk had the stock front mounts and a th350 rear trans mount when i bought it.
keeping all mounts intact, i built side mounts, then removed the front stock mounts.

12 years later when i did the current build, with the front clip off, i used the trans mount and fabricated side mounts off the just installed mustII x-member.
once the cab was removed, i blocked the motor up and swapped out the th350 for 700r4 and fabricated a very rigid trans x-member.
trans x-member also reinforced the cab mounts, replacing the support the stock trans x-member had.
the only fitment issue i ran into when the newly painted cab was reinstalled was i had to slightly modify the floor trans cover.
very minor