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  • 1974 - 1978 Mustang II Talk & Tech

1978 MUSTANG II V6 Swap

  • Thread starter Thread starter CERIGGIN
  • Start date Start date May 22, 2019
C

CERIGGIN

New Member
May 22, 2019
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May 22, 2019
#1
  • May 22, 2019
  • #1
I have a 1978 MUSTANG II Ttop and want to build a daily driver. I would like to do a V6 but doesn't seem like the 3.8 will fit. Before people start saying put a V8 in like I already stated I want to build a Daily driver with decent power and good fuel mileage. Does anyone have any recommendations for a V6 that would fit correctly without redoing the whole front end. OR has anyone done a 3.8 Swap and it was not as difficult as what it looks like. Any help would be greatly appreciated.
 

RaggedGT

Been here over a DECADE and still no CT
Mod Dude
Jul 20, 2014
4,739
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Taylorsville ky
May 22, 2019
#2
  • May 22, 2019
  • #2
What motor is in the car now?
I would think if it was a factory V8 car, then a V6 should fall in lol.
If it’s not a factory V8 car- then my vote would be for a Eco Boost swap
 

Adieu

Easy there, this ain't a dating site.
20+ Year Stangneter
Mar 7, 2002
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May 22, 2019
#3
  • May 22, 2019
  • #3
How much work are you willing to do, and which engine is in it/was in it when it left the factory?
 

LILCBRA

I wish I didn't have all of these balls in the air
Mod Dude
Dec 6, 2005
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Corn County USA
May 22, 2019
#4
  • May 22, 2019
  • #4
A straight V6 to V6 swap would be the easiest by far, but you may be able to pick up the parts from someone doing a V8 swap into a V6 car. Either way, for the easiest bolt-in swap, the 4.0L engines are the same family as the 2.8L that was stock in the II so I would think that that would be the easiest. I don't know if there were any engineering changes that would make it more challenging than finding an original 2.8 though, but it would definitely be an upgrade. The 3.8 is a completely different animal and wasn't offered in a II, so unless they use 302 mounts OR the original 2.8 mounts, it would be a little more in depth as far as fabrication goes.
 

429MII

5 Year Member
Mar 10, 2019
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British columbia Canada
May 22, 2019
#5
  • May 22, 2019
  • #5
Stick to the 2.8 based engine.
 
Reactions: LILCBRA
J

jeremyhpd

New Member
May 23, 2019
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Houston Tx
May 23, 2019
#6
  • May 23, 2019
  • #6
I have an original 1978 with a 2.8 and the original automatic transmission if you want we can talk trade or something. Right now I am currently debating on rebuilding it all or doing a strait swap to the 5.0 model.
 
J

jeremyhpd

New Member
May 23, 2019
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Houston Tx
May 24, 2019
#7
  • May 24, 2019
  • #7
CERIGGIN said:
I have a 1978 MUSTANG II Ttop and want to build a daily driver. I would like to do a V6 but doesn't seem like the 3.8 will fit. Before people start saying put a V8 in like I already stated I want to build a Daily driver with decent power and good fuel mileage. Does anyone have any recommendations for a V6 that would fit correctly without redoing the whole front end. OR has anyone done a 3.8 Swap and it was not as difficult as what it looks like. Any help would be greatly appreciated.
Click to expand...
I have an original 1978 with a 2.8 and the original automatic transmission if you want we can talk trade or something. Right now I am currently debating on rebuilding it all or doing a strait swap to the 5.0 model.​
 
C

CERIGGIN

New Member
May 22, 2019
5
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1
Maryland
May 24, 2019
#8
  • May 24, 2019
  • #8
74stang2togo said:
How much work are you willing to do, and which engine is in it/was in it when it left the factory?
Click to expand...

Really what ever it takes
 
C

CERIGGIN

New Member
May 22, 2019
5
0
1
Maryland
May 24, 2019
#9
  • May 24, 2019
  • #9
LILCBRA said:
A straight V6 to V6 swap would be the easiest by far, but you may be able to pick up the parts from someone doing a V8 swap into a V6 car. Either way, for the easiest bolt-in swap, the 4.0L engines are the same family as the 2.8L that was stock in the II so I would think that that would be the easiest. I don't know if there were any engineering changes that would make it more challenging than finding an original 2.8 though, but it would definitely be an upgrade. The 3.8 is a completely different animal and wasn't offered in a II, so unless they use 302 mounts OR the original 2.8 mounts, it would be a little more in depth as far as fabrication goes.
Click to expand...
I am actually looking at the 4.0 question is will the oil pan and pick up from the 2.8 work on the 4.0. If it does it would be a direct swap
 
C

CERIGGIN

New Member
May 22, 2019
5
0
1
Maryland
May 24, 2019
#10
  • May 24, 2019
  • #10
jeremyhpd said:
I have an original 1978 with a 2.8 and the original automatic transmission if you want we can talk trade or something. Right now I am currently debating on rebuilding it all or doing a strait swap to the 5.0 model.
Click to expand...
Where are you located
 
J

jeremyhpd

New Member
May 23, 2019
3
0
1
Houston Tx
May 24, 2019
#11
  • May 24, 2019
  • #11
CERIGGIN said:
Where are you located
Click to expand...
Houston Texas and this is the original 2.8 off the factory I cant give you much more details on here
 
C

CERIGGIN

New Member
May 22, 2019
5
0
1
Maryland
May 24, 2019
#12
  • May 24, 2019
  • #12
jeremyhpd said:
Houston Texas and this is the original 2.8 off the factory I cant give you much more details on here
Click to expand...
That won't work I am in Maryland
 
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