BUILD THREAD Montel the Slow Sedan

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Grendel

Not-quite-so-new-guy
Feb 4, 2017
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This car has bounced around between a few friends. First acquired by a younger friend of mine in 2010, in stock form for way too much cash. We thought the 305 was too slow, so I built a 98 Vortec L31 for him, installed it with Headman stainless headers, pypes 2.5" exhaust and a manually shifted 4L80E. Used a Holley blue electric fuel pump he acquired with a regulator on the motor to 680cfm Edlebrock carb and away we went. The AC sucked, so we deleted the HVAC. It was mostly stuff I had kicking around, the motor, the trans, etc.

To be clear, the fuel pump would lean out the car or flood it at times... may have been operator error, may not, but after doing it a few times, my younger friend was done. So I acquired it.

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It's a fully optioned car.

To be clear, I was not much of a fan. The floor boards were rotted, it was relatively slow in comparison to some of my other cars, so when another friend wanted it for his son, off it went.

They got it running right and drove it a total of about 300 miles in that configuration, but did things like an electric fan, an HEI in place of the MSD stuff, a Dakota Digital converter to run the stock speedo etc.

After a few years of sitting, I needed an SBC for a customers car (a Studebaker). This is a very nice L31, so out it came and we thought about selling it as a roller. Oh and I acquired it back for a Corvette chassis I had kicking around.

Thus we get into the "Might as well phase". I had a very very fresh L33 sitting around with a side mount Whipple super charger on it. The 4L80E was built to handle 500 + hp, so might as well throw it in. I had some GTO headers, but those didn't work in the G Body.
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So, the blower the motor was built for doesn't fit and the only headers I had won't work... what do you do?

Go looking through the pile, pull out a H1E turbo from a M939A2 military truck that got a turbo upgrade, that matches the 59lb injectors in the motor... it will run out of steam around 5900 rpm but have a boatload of mid range. Go fishing for some manifolds to mount forward, buy some 2.5" v bands and get the welder out.

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That's a truck manifold, cut and flipped forward, but we didn't like the way it worked with the steering column... more in a min, as I hit the 10 pic limit in this post.

We also get out of the might as well phase shortly, as we now have a purpose to this car and more time to think with 18 + inches of snow on the ground.


I am Grendel BTW, I am blessed to own a shop my father started back in the day. He did all restorations, I do hot rods. When he died, the business passed to my twin brother and I. My twin does the pure restoration work, my friends and I bop really fun ideas and projects off each other... things like high rev LS2 motors, COE Chevy trucks on semi chassis and all sorts of things that get to 90% finish rates and passed off to another in the pool.

More in a min, if y'all want it?
 
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Grendel

Not-quite-so-new-guy
Feb 4, 2017
17
2
3
Please bare with me as I get used to this board software.

So, we found a driver's side manifold we liked better - Giff (my buddy doing the engine fab work) had one kicking around and I read somewhere on the internet that an LS4 manifold wouldn't require us changing the steering shaft to a Cherokee (XJ) shaft. It still might get one, as the box is in good shape and I am not a fan of rag joints. So we cut that and welded stainless v-bands onto it, passenger side is a truck manifold, flipped and fabbed up the T4 cross over pipes, again in stainless. They will get wrapped.



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I mentioned an H1E turbo we had kicking around... if we get tired of the 500rwhp or so, everything but the injectors and turbo will support far more... including the 800hp charge air cooler we installed.

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Really starting to like this car now. Turbo's in, will get a single 4" exhaust... from a Duramax

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Used the elbow from the M939A2 to feed the motor
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Oh and we put AC back into the car with a custom bracket cut on the plasma table and used a compressor I had kicking around.

So remember when I said we're getting out of the "might as well phase"? Now we have a plan... this car could have some oomph to it. Now we have to plan a bit, because there's no way the stock 10b will hold 500rwhp or put it to the ground with it's open differential and 2.XX gears. Back to the shed to see what I have... oh, a fabricated 9" housing, 3.50 gears and a Detroit posi in a 3rd... and 14.4" Wilwood brakes I bought for another failed project. Some assembly required.
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Like this:
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I put them on everything. Nice to look into the differential to check gears, bearings and fluid levels.

So, we're going to have a stout rear end, with good rear brakes.

What about the front? Yep, have C6 Wilwood brakes that match the rear. Well crap, that means 18" rims. 500 plus HP will also chew up the rear tires. I read some where ( the jerks at UMI :) ) that you can put a little 315 series tire on the back... and we're not afraid to use the plasma or TIG either.

So, yeah, the plan is UMI's suspension kit with 315's on an 18 rim... happen to have a set of Rivals in that size... It also helps that we're now a UMI dealer... and have been a Ridetech dealer for a few years.
 

Grendel

Not-quite-so-new-guy
Feb 4, 2017
17
2
3
So, I need to order the suspension (don't have that yet).

I picked up a GM floor pan from my local detail to repair the rot. Everything else looks good, body wise.

Thinking that an 8 point cage will stiffen the chassis, even though we'll plate it on the car.

We're keeping the Lokar 4L80E shifter in the console.

The 0411 computer gets a 3 BAR MAP and a Corvette Z06 MAF in the Z06 air housing. The 0411 will control the electric valve body that gets installed into the 4L80E to replace the Transgo manual valve body.

The paint stays, the cheesy decals do not. I plan to use black anodized billet wheels. We'll reseal the T-roofs and re-do the interior. I have a guy that can make the stock buckets manage the occupants in the curves better.

I also have a vintage air unit kicking around. Condenser and compressor are already in.

Should be a g-body I like when done.

Y'all in for the ride?
 
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Grendel

Not-quite-so-new-guy
Feb 4, 2017
17
2
3
I just bought a set of GM 98 2wd Blazer knuckles from Timo. Anyone know what the Belltech 2102 does to our G body ride height?
 
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