360 to 390 swap with exhaust issue

[anotherbigeater]

I swapped out a 360 for a 390 in my 69 f250 2wd and now the driver side exhaust wont reach the manifold. Its like a foot short. The passenger side goes right up to where it should. Am I going nuts? I thought the only difference between engines was the crank. Even if the oil pan were removed there still wouldnt be enough clearance for the pipe on the driver side. I just keep asking myself WTF, how could the exhaust not fit? I dont remember another piece of exhaust going in there. The 390 is out of a car but I dont see that making a difference. Have I lost my marbles?

[fordman]

the manifolds fo ra car are different. use the truck manifolds on the drivers side.

[Jarred Hodges]

the manifolds fo ra car are different. use the truck manifolds on the drivers side.

thats all I csn think of too. Just swap your 360 manifolds back on and everything should be good

[anotherbigeater]

Yeah, thats what i'm using (manifolds from truck/360). The "new" 390 came w/ headers and I wanted to move the truck to a new location before I began all of the header exhaust routing stuff. I'm at a total loss as to what could be going on and its making me

[fordman]

maybe its just shifted to the passenger side and needs to be reshifted back evenly so it will reach. other than that nothing should be different. my engine came from a car . the exhaust is the same as it was before with the truck 360. i now have a car 390 in my trruck.

[70shortwide]

check to see if your exhaust pipe has slid back in the frame. sometimes if you dont have hangeres holding the pipe its will move around. good luck

[anotherbigeater]

I understand what all of you are saying and have addressed all of those issues.

The situation is this---I can have the passenger side up to the manifold to bolt on but the driver side is (lined up) but still a foot short of reaching the manifold. This is while the rest of the exhaust system is held up by its hangers in the correct spot. I swear I dont remember any intermediate piece between the manifold and the rest of the exhaust system but its starting to seem like the only possibility. Is that something any of you have seen? Have I just misplaced an exhaust piece that I cant find or remember?

[sideoilerfe]

Just cut it and ad another foot of tubing. Easy as pie. Next time pay closer attention to things when you take them apart. I've been in situations where i forgot things and it took me a while to figure them out.

[ToughOldFord]

Are you using the proper motor mounts? There is zero external differences in the two engines, you're going to have to study it to see what you're overlooking. Maybe some pics would help us help you.

[fordman]

ford did use those butterfly valves ont he exhaust manifolds so you could have misplaced yours who knows. i dont remember when they started using them but they did use them on some trucks. some wehre on the passenger side also i think .

[ezernut9mm]

ford did use those butterfly valves ont he exhaust manifolds so you could have misplaced yours who knows. i dont remember when they started using them but they did use them on some trucks. some wehre on the passenger side also i think .

drivers side and only about two inches. if he is off a foot there is a problem. it should bolt right back up. i put a 360 out of a 71 4x4 in my 66 that had a 352 and the exhaust bolted right back up.

[fordman]

i was thinking if he had the spacer on the passenger side and not the drivers side that could make up that difference he is seeing. maybe.

[ezernut9mm]

ahh, is this single or dual exhaust?

[anotherbigeater]

PROBLEM SOLVED.

ezernut9mm, its single exhaust.

My initial statement of being "off a foot" was born out my frustration with the delays in rebuilding and having to rely on my faulty memory. It was actually off only 4 inches and not "a foot", and their were no missing parts (butterfly valves, spacer,etc.)Sorry about the misinformation. I was so P.O'd molehills were turning into mountains.
It turns out the engine was from a car and the oil pan bump is further to the rear than the original. From the look of it, when I was below the truck, the pan remained deeper toward the rear of the engine but I dont have the other one to compare it to.

I'm going to add half a foot like sideoilerfe suggested and run the stock exhaust "logs" w/duals, from everything i've read headers are just a PITA for a stock 390.