I have a customer who wants to re-power his Fox-body with a "modern" small block.
Anyone know of an on-line A > B comparison between Chrysler and GM stock factory engines by cost, weight, durability, parts interchange?
Tried searches, nothing good showed up.
Thanks!

There is no good news price wise except the Apatche head out flows and out performs most aftermarket LS heads and matches or beats the best LS head depending on whose bench so heads are reasonable. There are no affordable rotating assemblys when you compare us to "them". Not gonna find any swap headers for hemi into a fox, there are more choices for an LS into a fox than you can shake a stick at from mild to wild. 1000 different cheap effective oil pans for LS, very little for the hemi. A good intake for the hemi is $1000 while the LS can have a good intake for EFI or carb around $300.

Bottom line is the heads are KILLER! The price of verything else aournd the hemi is awefull.

If he is talking stock... a LS in the fox body is a
standard now days.. I have a buddy with one... now
he wants to hang a turbo on the stock engine.. which
it will do nicely and make close to if not more than
a 1000 hp... I thought about going LS in my 38.. but
I decided to keep it mopar so I'm going gen 3 but I
MIGHT hang a turbo on it.. just for fun
EDIT
The LS is lighter than the gen 3.. cost seems to be
close or the LS might be a bit cheaper.. the LS has
way more parts to be had

Thanks, that's about what I heard. I'm sure the prices will come down a bit with higher sales volume.

If it's a Fox body, just throw in the LS engine. The swaps have been done for them plenty of times.

A friend of mine has a well set up mustang that he put a stock bottom end LS in with a 88 mm turbo and it threw a rod out of the side of the block on the 2nd 1/8 mile pass. It ran a 7.09 on the first pass.

Pound for pound a HEMI will beat an LS. No hate on the LS, but the stock HEMI heads are unbelievable. Yes an LS is cheaper, they seem to take boost better on stock bottom ends, guess it's what your customer wants. A 5.7 with a set of Apache heads will be hard to beat, an LS would need some pricey heads to match it, if he's looking for a JY engine to throw a bunch of boost at then an LS would be the way to go

We're doing a Boosted hemi fox body right now with a th400.... Do the LS

Not questioning your recommendation on going LS, but can you share your experiences with this swap? I'm sure the LS is easier with pre made mounts/headers but were there any other issues?

Is it going to be boosted? At that point, head flow doesn't matter much. My friend's 3500# car with an 84mm turbo hung on a 6.0 LS runs mid-8's with heads that flow 290/230. Do the LS.

I like the Hemi, but most Mopar guys don't know about the LS3 heads. Just to show you the GM guys always have it easier....

Even CNC ported they dont have anything over an Apache.

Apache's will go high 390's/400 won't they? Incidentally, the 6.4's in the trucks use a beefed version of the Apache head (same ones used in the HellCat). The LS3 seems like a good head though

Just to clarify I've got no issues with an LS, they're a great platform, and sometimes I wish I was a GM guy by how cheap they are, but I'm not.
Charger453 it's kind of funny how you're pushing the LS platform based on price when you've built a Mopar to begin with ($) with a big block ($$) (turbocharged right? $$$) in a 2nd gen Charger ($$$$), there's nothing cheap with he path you chosen, and I'm guessing you chose the obviously expensive route because you like Mopars. If it was all about price you would've/should've done a Chevy. You'd have to be living under a rock to not figure out an LS is cheaper, just like 20 yrs ago comparing a 350 to a 340/360, but thankfully Mopar guys chose to build 340's because they liked them better, and because they're a better engine, like a HEMI is better than an LS

Well, I consider myself an enthusiast rather than a Mopar guy. I realize what an Apache flows so I guess I should have been more clear in why I posted that. Last I knew, Apaches were going up in price and unless you want to notch the bores on a 5.7, you need an expensive 6.1 or 6.4. You won't get one of your 390 cfm Apache heads new for $1200. The LS3 will bolt onto any 6.0 which can be had for $1500 or less for a longblock, $1000 or less for a shortblock. He's asking for a Fox body, not a Mopar. For that build, I would most certainly push the LS.

Since you asked about my car, between friends and family, we did the work. It doesn't have a turbo. AND if my Charger were to get a modern engine, it'd be an LS. Both can be great engines, but it's all about availability, affordability, and aftermarket support for me.

Fair enough, Apaches are more expensive for sure, but I think they can be used on a 5.7 (I've heard both so I'm not sure).

Maybe someone has done it. When I was considering a Gen3 Hemi a while back, the consensus was that the bores needed to be notched. I'm not here to argue as I know how some Mopar guys are hard-headed when it comes to giving credit to any other brand, and that's not directed towards anyone in this thread. I just know what it will turn into once this gets some views. Let's face it... if the Hemi stock bottom end could handle any sort of boost, they would be a lot more popular. They have been put into damn near every production vehicle like the LS so they're plentiful. They are an excellent design. You're just not able to put 700-800+ HP to the stock internals like an LS.

There's been some discussion with that lately as well (boost on stock HEMIS). Seems if you open the ring gaps up it goes along way to helping them live under boost. The LS has done well in stock bottom end turbo applications but a fair number of them blow up as well. The "add a turbo to a 4.8 for an endless supply of 1000 hp" is a little bit of fanboy nut swinging. Like I said they do well but that fairytale has been stretched as far as the "HEMIS immediately explode with any boost" story

Some last, some don't. You are definitely correct there. I have friends with some that are definitely lasting. One is a Fox body running mid-5's. They will certainly pop eventually but then they just go get another shortblock for $500-$1000. I wouldn't be a fan of that as I'd rather drive my car than work on it. Opening up the rings gaps is definitely critical unless you like popping pistons apart. That's why they like finding the high mileage stuff; saves opening the rings.lol

Stock 5.7 bore stock Apache head.