is this happening??
i for one wonder this same question.
and i also have to say my 302 from 1400 up makes more power then any stock 4.0 that has been on the dyno we set my last motor up with.. buuuuuut...
my transmission handles it in a very wasteful way. i run 220's hp peak at the wheels 280s tq peak. thats full gt 40 with 9.5 compression 24# and 70mm on 87 oct 12+ degrees base.. in its current form its a bit less.
so thats the stock offering in crate form a guy can find these days, compare that to a crate 4.0.....you do it right and you can get one under 3 grand.
for a box motor you cant bitch cause it will be extremely reliable. but the 4.0 is also equally reliable and for non mud racing use is an excellent choice, the heat issues comparativly are non existant.
personally i dislike anything other then v8 sound, but a nice quiet 4.0 is just simply perfect in a sub 5 k machine for trail work. two t cases and a manual trans and deep 5xx gears into 60's with 40-42 inch tires are just perfect from what i have seen and experienced....
i know i wouldnt swap a good running 4.0 for a wheezer 5.0 in a trail rig. no way. once the 4 leaker popped i would. but hell may freeze over before that happens.
but you have to remember one thing with this swap the 4.0 to 5.0 issue... most "plan" to upgrade the wheezer 5.0 as funds allow.
we all know swapping in a non ho 80's 5.0 cause you could not find a decent running 5.0 ho setup with low miles.... without at least stroking it, is retarded when it is a 4x4 aplication.
most guys are always set to rebuild a base block...if it is a 4x4 aplication, i suggest always running a quality stroker. money well spent. even with fresh stock e7 heads and a regular ho intakes and 70 mm setup with 19# injectors the difference in usability is titanic. though you will want 24# injectors most of the time. but i am one for cost effective...and doing that for under 2 grand is tough, and if you already have a strong 4.0 powertrain, its just an investment if your taking your time building it while your wearing out the 4.0.
then again i see it different in another way. whats readily available??? and costs involved????? how do i get the most bang for the buck? you know...pull low cost unit fan to t case from donor and install into your rig???? what to do?? something cost effective in evey point of use..well 4.0's with low miles for one...but most will be cammers. 5.0's been out of use for a few minutes now, so low mile cherries fan to t case just arent falling out of the sky these days...but the behemouth tritons are.
and then you hear from me....shop for a modern gm powertrain...4.8/5.3/6.0-6.2.
at that point you can throw any rbv powertrain into a port o potty
fawkin 6.0's rock.
sorry, already this far off topic had to do it
so in reality, i agree.....for the original stated application, who would swap a stock 5.0 for a solid 4.0????
thats just a piss waste of swamper money right thar....