What do i need to swap a v6 mustang engine into a v8 mach 1?

not the MACH 1, or Cobra, which engine, v6 what size 3.8 or 4.6L?
no fuse told but yeah F1.26 ,is 30amps
v8 is 4.6 so not it.

it runs PCM but also runs both fan relays and that hug fan
fans can short easy
unplug it for and hot wire it to test he fan for shorts
a 30 amp fused hot wire is best to try. so wires in hand do no catch fire in you hands doing fan hotwire act.
test fan only if in car, parked no on the road risking overheating engine.
must be 3.8L as the 4.6 is 50 amp fuse.F1.1 in this case. and F1.31 direct to fan on larger engine , added this just in case v8
never blame PCM ,do blame all else bad.
for sure fan.
here is the schemo.

here is F1.1 path, PCM + fan/ 3.8L only.

from real service manual, to fix cars, A MUST.

What vehicles interchange with F150 4.6? - Ford F150 Forum ...

www.fordf150.net > ... > Modular/Triton V8 Engines: 4.6L, 5.4L (97-10)

Feb 17, 2007 - Well I have a 2000 F150 XLT 4.6 V8 and need a motor, What other vehicles have the same 4.6 V8 that will interchange with this truck? ... possibly an expedition of the same model year, I believe they have a 4.6 or 5.4. ... X - 4.6L EFI-SOHC, eight cylinder (Engine used only for Mustang GT and differs from ... Can i swap my 4.6L for a mustang 5.0 in my 97 f150? - Ford F150 ...
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4.6 to 5.4 Swap Notes - F150online Forums

www.f150online.com/forums/articles.../355403-4-6-5-4-swap-notes.html

Dec 7, 2008 - Application: These notes cover the F-150 from 1997 to 2004 Heritage ...All 97-00 and some 2001 4.6 engines use some sort of intake manifold .... So a 1999+5.4 PCM in a 1997-98 truck will need to have its PATS disabled. 5.0 coyote swap in 97-03 f150?
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If you are in CA, Smog inspection may not approve it even if you successfully swap motors.

im guessing your talking about a mustang, YES it will fit but keep in mind the rear end will not hold for long if your gettin on it. lol. the 4r70w trans should match up to it also. oh you will need the motor mounts from the v8.

CABIN NOISE IN 2000 FORD MUSTANG

obtain an engine management system computer from a car with a v8 engine that is the same make/model/year as the engine.

For the 3.6L V6
Firing Order:
1-2-3-4-5-6
Cylinders:
(back of engine)
3---------6
2---------5
1---------4
(front of engine)
Ignition Connections:
.(back)
1...2...3
5...6...4 (double checked-this is correct 5,6,4
..(front)

For the 4.6L V8 Cobra AND GT.
Firing Order:
1-3-7-2-6-5-4-8
Cylinders:
(back of engine)
4----------8
3----------7
2----------6
1----------5
(front of engine)

Let me know if this helped...

braz53190 is wrong, you either have the 3.8L V6, or the 5.0L V8. If you have the V8 you'll need a long extension for your ratchet, atleast 10in. I think the nut is a 1/2in, maybe 9/16. It should be about the same for the V6, I hope this helps.

At a minimum you would need to swap the motor mounts and change the springs to V8 springs.
Tony
www.foxbodyconnection.com

5.0
V8 Firing Order: 1 3 7 2 6 5 4 8 Distrib. Rotation Is Counter Clock Wise
3.8
V6 Firing Order: 1 4 2 5 3 6
1 2 3
5 6 4 <<<<< Ignition Coil Pack Plug Wire Order