Need help installing 390
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Senior User
Joined: Sep 2004
Posts: 223
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From: Rexburg,Id
Need help installing 390
I just put a 390 with bellhousing from a '73 F250 into my '66 F100 2wd, using my old granny 1st-four speed transmission. My problem is; everything is about 2" ahead of where it should be. I think I remember reading in this forum about moving the motor mount brackets back to the next holes, but I can't find that thread. Is this what I need to do? Will everything else line up if I do this (transmission mounts, drive line length, etc.)? Thanks for your help! You guys are great! Brett
Fleet Owner
Joined: Jun 1999
Posts: 24,552
Likes: 74
From: Creedmoor, North Carolina
Brett, I don't know what engine you pulled out, but your truck would have come with a 352 V8 (same as your 390) or a 240 I-6 and they both use the same perch. Wonder if someone has made a driveline change prior to you? There may be a couple sets of holes down there but not 2" worth.
hope someone can offer more
John
hope someone can offer more
John
Posting Guru
Joined: Feb 2004
Posts: 1,354
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From: Jackassville
I know exacty what your problem is!! I had the same problem, couldnt figure out why it was too far forward, then I remevered the motor mounts that bolt to the block, they were on the wrong side, I switched em, and it dropped right into place. Im willing to bet this is exactly what the problem is, the motor mounts are marked LH and RH for each side, they must go on the proper side or it will not go in, period.
Good luck and keep us posted
Good luck and keep us posted
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Senior User
Joined: Sep 2004
Posts: 223
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From: Rexburg,Id
Goy It!!!
I checked my motor mounts again; they were right. I remembered something I had read from this site about moving the motor mount stands; so I went back and reread some of the articles I had read earlier. I finally found--in the article about putting a Mustang 302 in an F100; by Donald R Haulsee--what I had read earlier. It says that if you are changing from a 6 cyl.; move the motor mount stands back toward the firewall to the next set of holes. This was a pain with the engine hanging there, but when I moved the engine back to where it needed to be-there were holes there to bolt them in place! I bolted them down, and my gearshift is now in the right place, the transmission crossmember holes lined up, and the driveshaft bolted right in without even moving the slip-spline! Now---if I just knew what to do about hooking my foot-feed cable to the 390 carb linkage! Thanks for responding, guys! It's really nice to know somebody cares! Brett
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