LS Motor Position
 

Im working on a 1972 Turbo 5.3 and would like to know what extra room can be had using offset motor mounts. (between pulleys and radiator)

DD has the adjustable ones
Jegs sells 2in back for half the price.
Engine as far back as possible would be ideal.

Big favor but could you guys check on firewall to engine clearances before I buy the wrong thing.

Currently the truck has SBC frame perches, BeCool 3 core and twin electric fans.


http://i175.photobucket.com/albums/w...psax57snf0.jpg

Re: LS Motor Position
 

One missing question: How much sledgehammer or Sawzall work are you willing to do to the firewall? :D

Overall, an LS motor is about an inch shorter than a regular SBC.

Re: LS Motor Position
 

eeehhh... none.. Its pretty.
batt and heater box can go though
http://www.theseriousbusiness.org/fo...3&d=1387546544

Re: LS Motor Position
 

I would suggest moving the sb engine stands back a set of holes on the frame, (give you 2 1/2" setback). You will need to drill the bottom hole on ea side. a set of carshop inc. 1" setback plates #CSP2370, @ $59.99, should set you as close to the stock firewall as you will want to go? Prothane #7-509 mounts ,will work with that ($86.99 through Jegs). You can also slot the engine stands & the trans crossmember, to give a little adjustment , as needed. On my app, I did include a set of Moroso engine mount shims...about $40, through a local speed shop. Down on the 4 th or 5th page, there are pics of my swap, that will show how close the engine fits in I 6 spot, but 1" forward (where I am trying to set you, by moving the sb stands rearward). Take a look @ the pics, & if you have any questions , on what I have not added/forgotten...fire away;) Best of fun, Longhorn

Re: LS Motor Position
 

thanks for the info, which thread are you referring to?
I'm almost to the point of mockup and build my own.
Trying to keep AC too.

Re: LS Motor Position
 

69 longhorn,ls swap pics....just about to the bottom of page 4 in this forum. Longhorn

Re: LS Motor Position
 

I used Dirty Dingo sliders and CPP perches. I have my engine about as far back as you can put it. I didn't do any hammering or sawsall work.

Re: LS Motor Position
 

Gonna try the cheaper way first as suggested by Longhorn.

I bought the metal stock today and it was the same cost as Carshop Inc.
so... ordered those too.

I6 location and 1in back. Hope the AC compressor still fits in the frame.

Re: LS Motor Position
 

I don't think you will find the ac compressor to fit the frame , with that mount/ bracket set up? I think the mount /spacer will need to be modded on the RH side, for compressor clearance....or an aftermarket bracket set, to mount the compressor in a higher spot. I am sure that some of the others will "chime in" on that one, as I do not run AC ? Longhorn

Re: LS Motor Position
 

HI Windsma, do as i did, used the organ donor truck mounts and make your own frame brackets. I used trailblazer compressor down low on passenger side using trailblazer bracket to block. Only issue is the lower 2 bolts go through compressor and bracket into upper edge on oil pan. trailblazer pan is odd, as front axle goes through it so modding the ac bracket will work. Truck ac has suction/discharge left to right and some guys notch the frame for ac lines. I used the trailblazer compressor because the suction/discharge are in-line front to back and the blazer compressor is a little smaller so you don't need to notch the frame. If i was to do it all over the trailblazer has everything you need. The mounts look like hockey pucks and sit low and back so not in the way of anything, headers,etc,etc. I will be making up a CCOT (cycling clutch orifice tube) system like the trailblazer uses. I,m running clutch fan so electrical hook-up will be easier. Probably use 73-87 c10 evap core in my 68 ac box, r134 accumulator, trailblazer lines and trailblazer condenser. Good luck, Brian F.

Re: LS Motor Position
 

Thanks Guys,
I ordered a low profile ac manifold. $26 with the correct washer kit 440-850
http://apairinc.com/apairdetail/451-11521.jpg
http://apairinc.com/detail.asp?Part=451-11521
Im sure theres lots of combinations, If this doesnt work i'll try the 01 perches.

Re: LS Motor Position
 

Don't mean to hijack the thread but you wouldn't happen to have some pictures of this setup? I think it might be beneficial for everybody to see.

I was in the exact same boat as far as engine position. I know I want to go FI down the road so I mounted the engine quite far back using the DD mounts on 73-87 stands. There's no way the stock truck compressor fits down low, it hits the DD mounts and I think the frame rails.

Re: LS Motor Position
 

Well i think my Delphi ac compressor is different than most.
I hope it will make it easier.. Im sure, with my luck, it wont.

Re: LS Motor Position
 

I'm with this guy!! Show us how this is done 68C10airstream!!

Re: LS Motor Position
 

Hi, I will try and post my first pics tomorrow. I will need my wife's help on this. Working midnights (12 hour shifts) this weekend, so be patient.

Re: LS Motor Position
 

I know this is gonna be a bummer but..
Giving up on turbo for now.
I would rather have AC

1in back plates showed up today.
I'll post pics this weekend

Re: LS Motor Position
 

.....I only know of two Burlingtons; the one in WI, and the one in VT...neither need A/C....
:smoke: :devil:
Priorities are in the wrong order.

VOTEBAN

Re: LS Motor Position
 

I agree... Even the GF says Turbocharge it..

BUT..

Burlington NC. Last summer had several 100+ days

And GAA Classic Auction is March 7th.. (Old farts love AC not hair dryers)
I can't get everything done by then.

Doesnt sell for the number in my head... Ill come back to the turbo thing.

Re: LS Motor Position
 

So this is all just to flip this truck?

Re: LS Motor Position
 

sell that pretty thing and get a 60-66
that's what the kool kidz drive

Re: LS Motor Position
 

[IMG]http://67-72chevytrucks.com/gallery/data/1986/0188.JPG[/IMG] This is my first pic ever posted

Re: LS Motor Position
 

Re: LS Motor Position
 

[IMG]http://67-72chevytrucks.com/gallery/data/1986/00121.JPG[/IMG] I modified the bracket. The lower left hand side and center bolt were added by me. I will be using the lowest open bolt holes for through bolts and nuts on the back side instead of the lower bolts originally threading into the side of the trailblazer oil pan. i just installed 98-02 camaro/firebird oil pan and didn't want to weld onto the side of the pan so i modified the bracket instead

Re: LS Motor Position
 

Time to buy a house and start a family. I have more toys.

Re: LS Motor Position
 

That's awesome 69C10, I think I'm gunna do this!

Re: LS Motor Position
 

Hi Houston Ben, When i get to buying lines, condenser, i will try the trailblazer lines first for sure as the 5.3,6.0 work with the compressor as mounted in the pics. As a past ase mechanic i looked at the system like this; the trailblazer interior volume is probably a little bigger than our cabs interior volume, and they had additional load of rear air also, compressor mounts down low and uses the inner serpentine separate groove off of the crank pulley with a short belt and it's own tensioner, the compressor sits in a cool ideal location, so if i can get the condenser to work from the trailblazer the fittings should be spot on, the blazer uses clutch fans as so does my 2001 set up. I will use the suggested evap core from 73-87 i believe (have to double check before ordering) so the only delima i see is the line between condenser to evap core and receiver drier (gm calls it an accumulator) with the inlet and outlet clocked correctly. The electrical is my specialty as i did my share of electrical and drivability work the last 10 years i worked. Oh, don't forget dirty dingo mounts i don't think will fit, probably run into the compressor. Good luck, Brian Fuller

Re: LS Motor Position
 

DOH! I used DD mounts, dang this would have been a great idea....Thanks Brian!

Re: LS Motor Position
 

almost done.

1in back plates
needed some cutting to reuse the 5.3 manifolds. Nothing major.
Gave up on AC and turbo for now.
Tank showed up today so maybe this weekend it will fire up.

https://scontent-a-lga.xx.fbcdn.net/...71865698_n.jpg

Re: LS Motor Position
 

Nice fit ;) Just a thought...rather than cutting the frame , or stands, you might look at the TBSS manifolds (on the cheap), or I found that the Hooker streetrod shorties worked well with my swap? Longhorn

Re: LS Motor Position
 

It wasnt terrible and i can add plates later if i want.
1in back and sitting high on stock mounts.. Little on the frame and little off the manifolds.. Done.

Re: LS Motor Position
 

Good deal;) Just curious...did you use the stock sb stands, & just move em a set of holes to the rear, or leave the stands in stock position? Longhorn

Re: LS Motor Position
 

Stock sbc perches in the sbc location.

Re: LS Motor Position
 

Thanks for the good info guys. I hope to be pitting a 4.8 into my 67 stepper, and mount the ac compressor down low. Thanks Brian. May have more questions. Rich (recovering brain surgery patient)

Re: LS Motor Position
 

deleted

Re: LS Motor Position
 

Hmm that's weird, I'm pretty sure I posted pics of my trailblazer mount here for future reference and now they've been deleted? Ah well, back to the other forums I guess.