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Johnny's GoatBuilt JHF buggy build

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214K views 993 replies 64 participants last post by  JohnnyJ  
#1 · (Edited)
At post 110 I changed my mind and decided I would build a buggy instead of the Wag. The Wag continues to wait for it's next build.

At post 187 I ordered up a GoatBuilt JHF chassis to hopefully speed this up. (edit: nope)

Current Build plan:
GoatBuilt JHF Chassis, 108" wheelbase, "jeep" hood and grille
2007 Ford F250 Dana 60, 5.38, Sparty locker, JHF high-steer
- narrowed 4" to use 78 F250 axleshaft on the long side, using factory 1550 shafts
1998 Chevy K3500 14-bolt, shaved, 5.38, Detroit, 1/2t chevy disc brakes
39" BFG Krawler Red labels on KMC Machete Beadlocks
2001 GMC Yukon XL 6.0L LQ4
  • Holley TerminatorX EFI
  • Champ oil pan (high-ish clearance, baffled, steel)
  • Dorman LS2 car intake and Warr cable throttle body
  • Holley fuel rails with late-model 6.0 truck injectors (EV6, E85 flow rates, 12613412)
  • Goatbuilt accessory brackets, TC pump on driver's side, alt on passenger
  • GM 706 heads
  • BTR Truck Norris cam
TH400 built by Tranny Tom, Reverse Manual with Winters/WOD shifter
Atlas transfer case, 3.0 low range
Fox 2.5 air shocks
PSC Full Hydro, 2.5x10" ram, TC-pump
Mastercraft cheap seats with Impact 5-point harnesses
Griffin 31x19 radiator, Derale 16927 shroud and twin fans
Goatbuilt fuel tank and factory fuel pump
Magnaflow muffler mpe-12649

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I bought my Wagoneer in 1997. It was my first 4x4 and I bought it so that me and my friends could go camping and have room for our gear since we all drove econoboxes. That fall I ended up moving to Germany for 18 months and it went into storage.

When I got back I rebuilt the AMC 360 with the help of a friend, and we did enough maintenance on the rest to get it on the road. Over the next few years it got a 4" lift and went from 31s and then 35s when I put a 3" body lift. We did some wheeling with it and eventually I put it on 33 Stampers from my old Wrangler.

In around 2005 it was parked due to lack of time and using any spare time on my Wrangler. A few years later we stole the drive train for the TREC Wagoneer, and it has sat since.

Over the summer I got out of racing, bought a RZR and drug this back in the shop. I'm thinking I want to get it back on the road and trails.

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#937 ·
Whiterhino stopped by on Tuesday night and helped put the drivetrain back in the chassis. After he took off, I pulled the heads and water pump, crank pulley, and front cover off in prep for a cam (BTR Truck Norris) and heads (GM 706 w/ PAC 1218 springs). Last night I cleaned the block head surface off in prep for new head gasket and then went after the carbon on top of the pistons. It took a bit, but that should be all set. I started looking at front of engine in prep for cam swap and noticed a piece of o-ring sticking out of the oil pump pickup. Ugh. Now I'll have to drop the oil pan and fix that. While I'm at it, I'll pull the oil pump to make way for a new timing chain since I'm there.

Odd thing about the o-ring is that I still had oil pressure, but now that I've seen it, I can't ignore it.
 
#939 ·
Getting there. Just have to clean up some covers and it's back where I started.

The other day I was looking back to when I first bought the truck with this motor and I had mentioned the previous owner said it used some water, but not a lot. I had forgotten that, but had noticed my coolant was always a little low every time I prep'd the car. Not a lot, but always had to top it off.

I didn't see anything obvious with the head gasket, but I'm wondering if that could be solved now. Will have to keep an eye on it.

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#944 ·
Engine is back to where it was on Tuesday night with exception of installing the water pump. I should be able to start reinstalling the wire harness tomorrow.
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I have the Improved Racing version, but apparently I f'd up the original o-ring install. I poked my head all around to make sure the o-ring was in and the tube was flush.
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#949 ·
Made good progress today. The lost part was a 2.5” v-band clamp. I wonder if it was broke so I threw it out without writing it down to reorder. I have some coming tomorrow.

I sorted out the wiring harness. There were a few sections that I didn’t loom originally, so I took care of that along with a few other minor things. I think I have all sensors plugged in on the engine.

My dipstick tube is pretty beat up, so I’m going to replace it and then I’ll install the starter.

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#951 · (Edited)
I wasn’t happy with my original transmission mount cooler when I did it. This is a copy of the bracket that came with the cooler, but tweaked for mounting it like I need to. This is cut from some scrap 0.040” and I have some 0.080” coming Thursday to cut the final version. That thickness was what the original bracket was built from.

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#952 ·
I've been really thinking about doing that cam and head combo. Just can't yet bring myself to tearing the engine apart when it runs so strong. I recently added more timing...and WOW.... HUGE gains. Look forward to hearing your feedback on the new combo. Everything is looking good and you are making quick progress.
 
#953 ·
I totally get it. If I was not torn down to a bare chassis, I'm not sure I could have talked myself into doing it. But I figured this was my opportunity to make the upgrade.

I'm trying to balance getting it back together quickly and taking some time to fix things I did in a hurry to get it done. It won't be done, but I hope to have it where I want it by the time I get it reassembled.