1984 LX Engine and Transmission Swap Questions - Ford Mustang Forum

LinkBack Thread Tools
post #1 of 7 (permalink) Old 05-07-2013 Thread Starter
gw7's Avatar
Joined: May 2013
Location: Milwaukee
Posts: 2
Question 1984 LX Engine and Transmission Swap Questions

Hi guys, new here, but not new to Fords or projects.

Long story short, my daily/project at the moment is a 2006 Focus ST, cleanly modified, and even installed a GT28R setup running 12psi.

But that's beside the point.

I was referred to this forum by a buddy who told me you guys all know your stuff pretty well, and was hoping you could answer a few questions. If all goes well, I'll stick around for quite some time during this project.

I have a 1984 LX 5.0 convertible, and I am unfortunate enough to have an automatic transmission along with it.

The automatic finally gave out at the end of last year, and this summer, my dad and I need a project as usual.

We are budgeted around $5,000 to do a complete motor and transmission swap, and would love to have something like a crate motor that would make some great power right out of the box. Keeping it in the 5.0 family would be ideal.

My Mustang knowledge is pretty slim, so I would love to hear some suggestions about the following:

-What motor should we go with?
-Where do we find a motor?
-What transmission and where to find it?
-Necessary supporting modifications?

thanks for sharing your knowledge.

gw7 is offline  
Sponsored Links
post #2 of 7 (permalink) Old 05-07-2013
PONY Member
pythontaco's Avatar
Joined: Jan 2013
Location: modesto
Posts: 659
Depends on how many horseys u want. I say buy an old motor from a junkyard rebuild it gt40heads and some bboltons and rebuild the aod and spent the rest on booze and hoars. But that's just me:hihi:

Beat 200k and brand new again.
91 gt, b&m Short shifter, upr sub frame connectors, upr lowering springs, electric fan, junkyard 3g upgrade, 255 walbro fuel pump. More to come....

"Why? Because Racecar"
pythontaco is offline  
post #3 of 7 (permalink) Old 05-07-2013
GT Member
Classic Member
5.0L Member
v8only's Avatar
Joined: Jul 2003
Location: Thompson
Posts: 1,234
A junkyard 96-01 Explorer 5.0 with a fox Mustang t5 manual or automatic will get u 300 HP flywheem then spend the rest of the money on supporting mods... FYI b sure to swap the Cam and valve springs for better ones

Sent from my SPH-L710 using Tapatalk 2


-86 ssp X chp 5.0 coupe
-66 coupe,Ford racing crate 5.0 roller engine, t5 trans, 8.8 explorer 373 rear,2005 mustang front disc conversion, lots more
-1972 Maverick undergoing full resto
-1998 Lincoln Mark Viii LSC Black/Black
v8only is offline  
post #4 of 7 (permalink) Old 05-07-2013
TexasMustang's Avatar
Joined: Nov 2008
Location: Midlothian
Posts: 1,208
What's the HP goal?
A stock 5.0 block is only good for 400-550 hp range. If you will be under that you have many options:
Stock short block with good heads
Stock long lock with forced induction.
Strock the 302 to 347
Or a 351w is a great upgrade if you won't big power on budget

The swap from an aod (aotomatic) to a 5 speed isn't too hard. There is a thread in the stickies on it. The T5 is limited on how much power it will hold.
TexasMustang is offline  
post #5 of 7 (permalink) Old 05-08-2013 Thread Starter
gw7's Avatar
Joined: May 2013
Location: Milwaukee
Posts: 2
Thanks for the quick responses guys.

As for power, we're actually looking to get some big numbers, hopefully 350-400 or above. crazy power is fine, i'd imagine our budget of 5-6k could buy us something with a blower, perhaps a crate motor?

thanks again for answering my questions.

gw7 is offline  
post #6 of 7 (permalink) Old 05-08-2013
PONY Member
Old man's Avatar
Joined: Jan 2009
Location: Macon
Posts: 620
I was digging through time slips today, and I saw my old 1983 with an "engine swap" ran low nine's at nearly 150 MPH with a single Holley 4 bbl.

More practical though, a set of good aluminum heads, with a good cam grind, good headers, and a good intake and carb would easily get you 350-400 HP and be streetable. You might want to buy a good crate motor. That's the way to go, although they are usually under-cammed.

89 LX coupe with 363, modified PT 7675 CEA turbo with billet wheel (at moment), Super Glide transmission, street legal with full interior. Runs low mid 5's in the 1/8th, mid 8's in the 1/4 through mufflers on Pro Radial tires
Old man is offline  
post #7 of 7 (permalink) Old 05-08-2013
cindys_sn95's Avatar
Joined: Nov 2007
Location: Gulfport
Posts: 7,170
keep researching gabe..... sounds like a fun project for you and your dad.
cindys_sn95 is offline  
Sponsored Links

engine , foxbody , motor , swap , trans

Quick Reply

Register Now

In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

For the best viewing experience please update your browser to Google Chrome