Questions about a Mark VIII Engine swap.
10-04-2009, 04:24 PM
#1
4th Gear Member
Thread Starter
Join Date: May 2009
Location: DFW, TX
Posts: 1,925
Questions about a Mark VIII Engine swap.
Lets start by saying that I did search, but I couldn't find any solid answers. I was acting an *** and popped a head gasket on my car. Long story, but I am not changing the HG since I have had nothing but trouble with this particular motor in this car. Even after a rebuild (Knocking, coolant loss, etc) I would go with a PI motor, but I am taking it from a Pick U pull and Mustangs and PI's are damn near impossible to find. Mark VIII's aren't however, so I am thinking about putting it in my mustang.
I will be getting the long block for $119 so it's cheap enough.
What exactly is required for this swap and I mean REQUIRED, not "Get the 99 cobra heads cause they make more power". 280HP from the Mark VIII is plenty enough for me. So my checklist:
1. Will the stock Mustang wiring harness work?
2. Will the stock computer work?
3. Will the 2v accessories work? (A/C, Power Steering, etc)
4. Will the 2v clutch work?
5. Will the Mark VIII intake work, or will I need the Cobra Intake?
6. Will the 2V headers work on the 4V heads?
Thanks in advance.
I will be getting the long block for $119 so it's cheap enough.
What exactly is required for this swap and I mean REQUIRED, not "Get the 99 cobra heads cause they make more power". 280HP from the Mark VIII is plenty enough for me. So my checklist:
1. Will the stock Mustang wiring harness work?
2. Will the stock computer work?
3. Will the 2v accessories work? (A/C, Power Steering, etc)
4. Will the 2v clutch work?
5. Will the Mark VIII intake work, or will I need the Cobra Intake?
6. Will the 2V headers work on the 4V heads?
Thanks in advance.
10-04-2009, 04:27 PM
#2
6th Gear Member
Join Date: Feb 2006
Location: Virginia
Posts: 11,786
Lets start by saying that I did search, but I couldn't find any solid answers. I was acting an *** and popped a head gasket on my car. Long story, but I am not changing the HG since I have had nothing but trouble with this particular motor in this car. Even after a rebuild (Knocking, coolant loss, etc) I would go with a PI motor, but I am taking it from a Pick U pull and Mustangs and PI's are damn near impossible to find. Mark VIII's aren't however, so I am thinking about putting it in my mustang.
I will be getting the long block for $119 so it's cheap enough.
What exactly is required for this swap and I mean REQUIRED, not "Get the 99 cobra heads cause they make more power". 280HP from the Mark VIII is plenty enough for me. So my checklist:
1. Will the stock Mustang wiring harness work?
Yes
2. Will the stock computer work?
Yes
3. Will the 2v accessories work? (A/C, Power Steering, etc)
Yes
4. Will the 2v clutch work?
Depends on your year and bolt pattern
5. Will the Mark VIII intake work, or will I need the Cobra Intake?
Get the Cobra
6. Will the 2V headers work on the 4V heads?
Thanks in advance.
I will be getting the long block for $119 so it's cheap enough.
What exactly is required for this swap and I mean REQUIRED, not "Get the 99 cobra heads cause they make more power". 280HP from the Mark VIII is plenty enough for me. So my checklist:
1. Will the stock Mustang wiring harness work?
Yes
2. Will the stock computer work?
Yes
3. Will the 2v accessories work? (A/C, Power Steering, etc)
Yes
4. Will the 2v clutch work?
Depends on your year and bolt pattern
5. Will the Mark VIII intake work, or will I need the Cobra Intake?
Get the Cobra
6. Will the 2V headers work on the 4V heads?
Thanks in advance.
Yes
2. Will the stock computer work?
Yes
3. Will the 2v accessories work? (A/C, Power Steering, etc)
Yes
4. Will the 2v clutch work?
Depends on your year and bolt pattern
5. Will the Mark VIII intake work, or will I need the Cobra Intake?
Get the Cobra
6. Will the 2V headers work on the 4V heads?
10-04-2009, 04:43 PM
#3
4th Gear Member
Join Date: Jul 2009
Location: Virginia
Posts: 1,216
I'm doing the same swap, motor is completely modular to my cobra, i belive its the cams/intake are the only difference. intake yes, and either entire heads, or just the cams inside. other than that, you have a cobra motor with a teksid block and forged crank
10-04-2009, 05:23 PM
#4
4th Gear Member
Thread Starter
Join Date: May 2009
Location: DFW, TX
Posts: 1,925
Ok, what about the headers? I think that they will work because the passenger side one has the same part number as the GT, but the driver doesn't. I know that the Mark VIII on the drivers side has the catalytic converter attached to the header, so that may be it.
Doesn't the computer need to be flashed to a cobra since I have a GT, or does it work out of the box. Oh and I think I have the 6 bolt fly wheel.
Doesn't the computer need to be flashed to a cobra since I have a GT, or does it work out of the box. Oh and I think I have the 6 bolt fly wheel.
10-04-2009, 06:22 PM
#6
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Thread Starter
Join Date: May 2009
Location: DFW, TX
Posts: 1,925
10-04-2009, 06:49 PM
#7
6th Gear Member
Join Date: Feb 2006
Location: Virginia
Posts: 11,786
Ok, what about the headers? I think that they will work because the passenger side one has the same part number as the GT, but the driver doesn't. I know that the Mark VIII on the drivers side has the catalytic converter attached to the header, so that may be it.
Doesn't the computer need to be flashed to a cobra since I have a GT, or does it work out of the box. Oh and I think I have the 6 bolt fly wheel.
Doesn't the computer need to be flashed to a cobra since I have a GT, or does it work out of the box. Oh and I think I have the 6 bolt fly wheel.
10-04-2009, 07:47 PM
#8
2nd Gear Member
Join Date: Sep 2007
Location: Az
Posts: 389
everything works together except the exhaust manifold, 2v and 4v have different ports... the wiring of the GT will need to be extended though... the only difference is intake manifold and camshafts. I am doing this swap to my GT and that is as far as I know.. it is almost a bolt on..
10-04-2009, 08:37 PM
#9
4th Gear Member
Thread Starter
Join Date: May 2009
Location: DFW, TX
Posts: 1,925
everything works together except the exhaust manifold, 2v and 4v have different ports... the wiring of the GT will need to be extended though... the only difference is intake manifold and camshafts. I am doing this swap to my GT and that is as far as I know.. it is almost a bolt on..