Deciding on Foxbody LS swap
I'm in need of some feedback from people with more experience than I have. Last winter I picked up an 89 foxbody as a project car. My project has ground to a halt because I cannot decide whether or not I should stick with the Windsor engine that is stock to the car or go with an LSx swap. Obviously I know in all performance aspects the LSx is superior. I am asking this question on an LS forum rather than somewhere else, because I've noticed that people here seem to be more open discussing swaps, whereas on Ford forums you get attacked for the idea of ever using anything other than a Ford engine. The reason why I haven't made up my mind is for a couple reasons. One, while I do have a budget for this project (or else I would have never even gotten the car), I don't have an UNLIMITED budget. The reasons why I could think of staying with the stock engine is, well, because it was made to be there and I already have one. The engine being stock to the car would cut down on the unknowns, like little bolts or pieces you didn't know you would need at the start of the swap, which add up after awhile. The second would be simplicity. I don't want to be 6 months into the swap and the car is torn apart, and I am suddenly in a position where the swap was much more difficult to complete than I imagined and I don't have the budget to dig myself out of the pit I'm in, and the project is derailed because of it. Then again, maybe the swap isn't the difficult. It's hard to tell with no definitive step by step guide out there.
The reason why I want to go LSx is because, as I'm sure everyone knows, that all but the most extreme built 5.0 Windsor engines make around the same power that an LSx makes stock. I'm not all about absolute power, my car will never be the fastest car to exist anyways, and I'm building for handling, not an all out drag car, but at the same time, I don't want to spend the same amount as what a swap might have costed on building the Windsor, only to make what a LSx makes stock power-wise. Secondly, the all aluminum LSx weighs a lot less than the 5 liter. Between a tubular K member and the LSx, it'll cut a lot of weight off the front of the car.
I guess before I commit to buying an LSx, I'm hoping to hear from someone who maybe has already done this. I've tried to read as many threads on different forums about it as possible, but either the swaps aren't well documented, their never finished, or the swap is a lot different from what I plan. I want to stick with a manual. If I go through with this I'll probably aim to get an L33 out of the Silverado, they're less expensive than the LS1,2,3 etc, but still all aluminum. Probably a TKO 500/600 using that Quicktime bellhousing. I don't really have any interest in going with an automatic, despite hearing it makes the swap easier. So basically my question is, will I be better off with a more mild build/refresh LSx swap, or should I stick with going with a built Windsor. Will my budget be nickle and dimed to death by small parts needed to complete the swap? I know of the big things you need, obviously. The engine mounts, swap headers, K member, bellhousing to adapt the transmission, but what other unknowns are needed? Unfortunately I have never found a complete list of what the swap requires. My budget is around $15,000 to build the car. That includes the engine, suspension, transmission, fuel, interior etc. Paint and body I have a separate savings for. I know that there are super budget builds out there, but unfortunately in my area, nothing "budget" seems to exist, and on top of that, I want this to be a well built car, not a car made up of junkyard parts. I want it to be reliable, not just get it to the point of running to make a few passes on the strip before the thing dies, like in most budget builds.
Any feedback would be greatly appreciated. I've always wanted to build a car. I want to do it right the first time and be able to enjoy it. I don't want a life long dream to turn into a nightmare because of some poor choices at the start. I'm itching to get going but I can't pull the trigger on anything before I have a plan in place. Thank you!
Given the taller deck height of the LS - the better comparison is comparing the LS to a 351W or 351C. 80 lbs, or so, weight savings IF the 351 has aluminum heads. 125 lbs if not.
In regards to what you said, thanks for clearing up what I thought about the weight. All I ever hear is about how much lighter all aluminum LSx's are compared to the iron block 302. I guess people just assume it's much lighter because of the different metals or something. Wouldn't you say, though, that the ease and potential to make much more power with an LSx offsets any slight weight increase vs the 302?
Last edited by johnkilo; Jul 30, 2018 at 12:26 AM.
Any budgeting I’ve ever done includes a line item called “contingency” - it’s an amount to cover those surprise items you didn’t budget for. The more detailed your planning is - the smaller your contingency can be. We can’t help you determine if $15k is enough without a ton more detail. Otherwise we’re all, including you, just guessing. As swaps go this one is pretty straightforward. Doesn’t mean there’s not a lot of details to deal with.
Engine $1600
Cam Package (cam, valvesprings, retainers, Timing chain, oil pump, pushrods) $865.96
LS7 lifters $174.12
Holley Dual Plane Intake Manifold $271.95
Hooker engine mounts $150
Hooker Long tube headers $1000
Quicktime bellhousing $726
Holley GM LS RETRO-FIT OIL PAN BAFFLE KIT $211.95
$2359.90
Holley TERMINATOR LS TBI KIT $2270.95
$2270.95
TKO 600 Transmission $2595.00
$2595.00
K-Member Package $1756.40
Coil-Over Kit, Koni Shocks, rear, 1979-04 Mustang non IRS $319
Koni Package, SA Struts & Shocks $665.84
Steering Shaft Assembly $219.97
Steering Rack Bushings, Solid $50
MM Front Swaybar with bushings and endlinks $225.49
Adjustable Rear Swaybar, solid-axle Mustang $369.97
MM Full Length Subframe Connectors 159.97
Heavy-Duty Mustang Rear Lower Control Arms 249.95
Panhard Bar $384.97
$4401.56
MUSTANG SVE BASE 5-LUG CONVERSION KIT - 31 SPLINE $2,349.99
$2,349.99
FORD LIMITED SLIP DIFFERENTIAL – 31 SPLINE TRACTION-LOK $249.99
Mustang Ford Racing Rear Axle Girdle/Differential Cover $214.99
Mustang Ford Performance 3.73 Gear Kit for 8.8" Rear End $279.99
$1069.97
Mustang Lock Set w/ Black Bezel $54.99
Mustang Replacement Quarter Windows $350.96
Mustang Front Windshield Molding Kit Black $119.99
Mustang Headlight Kit w/ Amber Side Markers $84.95
Mustang Sunroof Latch Assembly $59.99
Mustang Acme Door Panels W/ Power Windows Black $354.99
Mustang Rear Seat Delete Kit $379.99
$1405.86
I realize that they have K member packages from places like Team Z and AJE that are significantly cheaper than the Maximum Motorsports one, but I've read about worries of them being good for road use as they are drag strip focused and not as sturdy as the MM one.
I'd allow at least a 25% contingency..... With the stuff listed above -- and some of the other stuff I've mentioned - looks to me like you may come in closer to $20k.
Having had both motors - there's no comparison. LS so much quieter, more refined, smoother -- just a better all around experience. And that's without the HP/torque benefits especially if you go 6.0L/6.2L.
Next thing I'm going to do is make a list to see what I will spend if I stick with the 302, that's a good idea.
Thank you for the feedback, I really appreciate it and the constructive criticism. I'm sure it's frustrated to answer questions from someone inexperienced like me, but I really appreciate it.
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As for reliable used engines - best to simply deal with a reliable vendor. You can end up with a used engine that doesn't work right - no way around it. You need someone who'll stand behind it.
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