1990 super duty engine swap
#1
1990 super duty engine swap
Hey guys plain and simple i have a 1990 f-superduty (10 lug wheels) i pulled the bad 7.3 idi 5 speed out and because this truck has like 5:13 gears and did haul one hell of a load and stop great especially with 4 wheel disc brakes i have decided to put a 300 l6 in it. i figure with the 300 with a 4 speed and the 5:13 gears it will pull anything.Probably only do about 50 mph topped out which is fine i only want it to be a backup pull rig, may even go 5 speed later as i already have a 78 300 and 4 speed ready to go in.What im having trouble with is the frame mounts i haven't found any information saying for sure that 1990 f150 or such 300 mounts will bolt in to my frame in place of the 7.3 idi.
Any help would be appreciated however i am not looking for critisism on my is dumb or ill advised because i am looking foward to it.
for life
Any help would be appreciated however i am not looking for critisism on my is dumb or ill advised because i am looking foward to it.
for life
#3
Thanks bbf385 but looks like you didn't finish reading cause i'm not looking for negativity towards my build but help. But i realize in todays sociaty you think your required to answer.Even if you have nothing positive to add. i've seen 300s out last and many many larger cubic engines. and thats what im looking for. Reliabilty, simplicity, and ease of work.
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Okay, you're gonna do the deed and no amount of persuasion will stop you.
So, remove the perches from the SD, make a cardboard template and go to the JY. Hold it up to a few F-150 crossmembers that had 300's to see what you got. I'm gonna guess they're not very close in shape. Be ready to make your own perches.
If they are close (which would surprise me), get a set of perches, bolt them to the 300 and drop it in. Heck, you might just drill a hole or two and bolt them in.
Just my $0.02 USD worth, I would build it with a 5 speed. That way, on flat ground, you would have 5th to save wear and tear on the I-6
Just be advised, this ain't gonna be fast by no means and it will drink the gas.
So, remove the perches from the SD, make a cardboard template and go to the JY. Hold it up to a few F-150 crossmembers that had 300's to see what you got. I'm gonna guess they're not very close in shape. Be ready to make your own perches.
If they are close (which would surprise me), get a set of perches, bolt them to the 300 and drop it in. Heck, you might just drill a hole or two and bolt them in.
Just my $0.02 USD worth, I would build it with a 5 speed. That way, on flat ground, you would have 5th to save wear and tear on the I-6
Just be advised, this ain't gonna be fast by no means and it will drink the gas.
Last edited by raystankewitz; 02-20-2018 at 05:54 AM. Reason: typo
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