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#26 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
Magnaflow Y pipe arrived today. I was planning on using the stock y pipe but the place I bought the engine from screwed up and cut it off even though they told me they'd include it. When I informed them of their mistake they said they would send the part they cut off. What arrived was the a piece of the correct y pipe and 2 incorrect catalytic converters from another vehicle so I gave up on that idea. Found this High performance magnaflow unit for half price so it was cheaper than a stock replacement. I also started putting the Holley oil pan on so I can place the engine in the truck. Quite a difference between it and the stock ssr pan (which is a front sump). I'll also need to drill out the boss in the block for the Holley dipstick. The LM4 had it's stock dipstick inserted into a boss on the oil pan.
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#27 |
Registered User
Join Date: Mar 2015
Location: Washington State
Posts: 1,644
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Re: Loosenutz's 66 SWB BBW LM4 Build
Awesome build so far! I did this basic conversion on my 1969 C10. I will be honest and tell you i completely rebuilt the 5.3 iron block and damn, the design changes from Gen 1 Chevy blocks is great! Everything is O-Ring gaskets, fitiment is perfect, the crank is in with 6 bolts, and so on. Anyways, nice build, you will love the LS.
I will say this, i used dirty dingo motor mounts and when the 4L60E was in, my drive line to Tranny and Rearend angles were way off! I had to add 1.5" aluminium block to the tranny mount to get them to a decent angle. The tranny was pointing down at 13 Degrees. It could be the motor mounts, either way i had to install a High Hump cover to get enough clearance. Good Luck on this, ill be watching for updates. Now i am off to go work on the next project, my 1966 Factory shortbed fleet. |
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#28 | |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
This is my 2nd LS swap. I agree with you 100%. They are super easy to work on and superior in every way to the older generations.
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#29 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
Fabbed up some brackets to mount the SSR radiator assembly to the C10 core support. Pretty happy with how it turned out.
Last edited by loosenutz; 09-21-2019 at 12:42 AM. |
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#30 |
Registered User
Join Date: Sep 2010
Location: Hancock Md
Posts: 403
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Re: Loosenutz's 66 SWB BBW LM4 Build
Always nice to see parts showing up and going together.Good job on the radiator setup. I like re-using as many stock parts as possible for something like this so I really appreciate what your doing here lol. I like that Y pipe setup too,looks like real nice work.
I wasn't a big fan of the LS when they came out but being around them for awhile I kinda saw the light on them, I ended up with 2 4.8's for dirt cheap (one still in a running and driving truck) and plan to swap into one of my project soon but the wiring is what worries me. I plan to follow an online guide and trim the stock harness down to just the needed wires. |
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#31 | |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
The Dirty Dingo mounts must put the engine pretty high? I set the engine and trans in this weekend. The trans is on the factory crossmember using the low profile Energy Suspension mount. I positioned the engine so the Holley 302-2 pan has 3/4" clearance to the top of the crossmember. My tranny is currently pointing 3° downward and my driveshaft is perfectly level. These universal mounts are going to work great! I'll post details once I'm done
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Last edited by loosenutz; 09-23-2019 at 11:31 AM. |
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#32 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
Got the Holley 302-2 pan installed. Also drilled the hole in the block for the dipstick that the Holley pan utilizes.
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#33 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
After that I set the engine in. Positioned it so there's 3/4" clearance between the Holley pan and the cross member. I'll need to trim about 5/8" off the bottom of the front engine mount tabs and 7/8" off of the back tabs. After that I just need to weld the tabs to the crossmember. Really happy with how these universal mounts are working out. It's nice to be able to position the engine exactly where you want it. I'll also need to clearance the frame to clear the SSR power steering pump and just slightly to clear to passenger side exhaust manifold.
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#34 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
After trimming the motor mount tabs, they fit perfect. Welded them in tonight.
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#35 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
One good thing about using motor mounts like these is there's a lot more room for the exhaust manifolds. I've seen numerous builds where the mounts were in the way of the headers so the engine had to be moved forward or backward. I also clearanced the frame slightly for the flange on the passenger exhaust manifold. It wasn't actually touching but too close for comfort.
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#36 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
Painted the CPP master cylinder tonight and then installed the assembly. Had to shorten the push rod that came in the kit some. Even at its shortest adjustment it was 1/4" too long so I removed 1/2".
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#37 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
Bolted the stock AC compressor and lines in tonight to see how much interference there was. Amazingly it fit perfect. I'll just need to fab up a bracket to support the bottom of the AC mount. It was originally bolted to the oil pan but the Holley pan doesn't have provisions for that.
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#38 | |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,964
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Re: Loosenutz's 66 SWB BBW LM4 Build
Quote:
Could you put a stud on that bolt of the pan that looks close to being between the 2 mounting holes on the compressor? If so, a simple-ish 90° bracket should/could anchor to that (the stud, pan rail, bracket, & a flange nut to secure it all). Or, the stud gets a flange nut for the pan, a/c bracket goes on that & a 2nd nut to secure the a/c bracket?
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#39 | |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
You read my mind, that's exactly what I'm doing but I'm going to use 2 bolt holes not just one.
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#40 |
Registered User
Join Date: Sep 2010
Location: Hancock Md
Posts: 403
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Re: Loosenutz's 66 SWB BBW LM4 Build
Everything is looking so good on this I dont have much to add other than maybe gusset between your motor mount tabs either on top or the bottom. I have had the flat tabs like that start flexing before right above the welds and end up either cracking or just bending.
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#41 | |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
Yes, gussets will be added. Just haven't gotten to it yet.
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#42 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
Got my inner fenders and core support back from the powdercoater. They look amazing. Hard to believe they turned out this great when they were terrible before. A big shout out to Valley Powdercoating in San Diego. I'd highly recommend them.
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#43 |
Registered User
Join Date: Jan 2016
Location: White House , TN
Posts: 61
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Re: Loosenutz's 66 SWB BBW LM4 Build
Roughly how much did it cost to powder coat the inner fenders and core support ?
TIA |
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#44 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
Well... I know the owner so my cost was much lower. I could ask him what he would normally charge.
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#45 |
Registered User
Join Date: Jan 2016
Location: White House , TN
Posts: 61
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Re: Loosenutz's 66 SWB BBW LM4 Build
No biggie , glad you got a deal on it . I have new inner fenders and core support , I’m on the fence about painting or powder coating .
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#46 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
Finished making the lower ac support bracket. Turned out perfect. I used the original lower bolts but had to trim about 5/8" off of them.
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#47 |
Registered User
Join Date: Apr 2001
Location: DALLAS,TX
Posts: 21,964
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Re: Loosenutz's 66 SWB BBW LM4 Build
Yep.... That's the bracket I was thinkin'. Simplish, clean, & supportive.
__________________
67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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#48 |
Senior Member
![]() Join Date: Aug 2017
Location: Louisville, KY
Posts: 370
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Re: Loosenutz's 66 SWB BBW LM4 Build
Love it.
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#49 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
Finished up with clearancing the frame for the power steering pump. I welded in a pretty solid brace so should be more than strong enough. Plus this is forward of any suspension mounts so not much stress there. I also added gussets to the motor mount tabs for added strength. Didn't bother to get pics of that.
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#50 |
Registered User
Join Date: Jul 2019
Location: San Diego
Posts: 73
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Re: Loosenutz's 66 SWB BBW LM4 Build
Trimmed all the excess off of the factory ecu mounting bracket. Then bolted it to the driver's inner fender. Once the core support is on it should be semi hidden. Planning to mount the under hood fuse box from the SSR next to the ECU. Going to have to make some custom brackets to pull that off.
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