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90 Z71 454 swap

Joe91M

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Joe91M submitted a new Build:

90 Z71 454 swap

So I'm in the middle of installing a 6 inch skyjacker on my 90 SC/SB dd. I'm having a few issues since the kit is NOS that a friend purchased 10 years ago for a different truck. My biggest concern is weather or no I should bolt the upper A arm brackets to the frame like the directions say or burn them in since all the adjustment is done between A arm to bracket not bracket to frame. Any opinions wlwould be helpful and if this gets any interest I will post pictures.

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This is a little late as I've already finished the lift and broke a slew of parts this weekend but here it goes

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The A-arms get relocated down about 5.5 inches for the uppers and 6 for the lowers. The front axle is removed and reinstalled with drop brackets. Then the Lower A-arm brackets are tied together with a a front and rear cross member wich also supports the back of the front axle.

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I done a few sketchy things in my time and gotten away with it...don't work under a truck supported by jack stands that are sinking into the ground. :deal:

That said, I like those trucks and that lift should be ok, if your not to hard on it.
 
Ya. That was a sketchy situation but we have built trucks in worse places in that yard. Hopefully my other build will be at my new house in the shop. Unfortunately, we had a deadline and his one bay shop was tied up
 
I have a super lift on my 92 thats the same, the arms are relocated.. looking at it Id leave it bolted in.. mines never moved or given me any issues. If you dont crank the bars too much itll ride nice too.
 
So I will have some more pics tomorrow if I can remember but the lift did fine this weekend. The transfer case driveshaft and pinion yoke however... Long story short, a 5 grand clutch dump in dry pavement is always a bad idea with questionable driveline parts
 
No pics tonight. Sorry. Spent the afternoon trying to clean up my buddy's yard a little bit as I currently have two trucks and a trailer in it on top of all of his projects. We will be pulling the 241 out of my 93 to fix the 90 since the 93 is getting a 205 and sas later this year. The real question I'm up against us weather or not it's wrong to put a trussed 9 inch and a ford high pinion 44 in my 93 instead of a 14 bsf and my Chevy outers. It just seems easier. Is that sacreligious
 
So I'm thinking that my suburban is going to be donating a 454 to my 90 1500 as well as a 14bsf and maybe some 3/4 ifs running gear. The truck did pretty well for me on a 2300 mile round trip from GA to VT, but it's definitely showing it's age. The rear end started howling the last hundred miles home, despite being freshly topped off 2 hours before in a Walmart parking lot. The valve covers have decided to stop weeping and start pooling oil on the valley, and the odometer stopped at 221,xxx about 5 years before I bought the truck. So, now I think it's time to start going through it and deciding what to rebuild and what to replace.
 
Sometimes it's the little things that bring you the sense of accomplishment you need to stay motivated. Radio delete panel, complete
 
So the angry little man made an appearance Thursday around cylinder 8 followed by his girlfriend the screamer. Long story short, the bottom end is toast, which means it's time to swap in the 454. Hopefully I'll be pulling the motor after one last burnout tomorrow. Then a quick trip to summit racing and a few days of cleaning and assembling the big block and I will be back on the road.
 
Pictures of the damage. The rear of the block is broken out around the cam bearing, the oil pan has 3 1/2 in holes that look like a rod bolt and some shrapnel exited to the passenger side and the rod hit the driver side. Number 7 rod is in three pieces with no sign of the cap so far and the rod bearing is smeared all over everything it came in contact with. The cam is in multiple pieces and the windage tray has a hole through it. The motor ran for a week without the #7 piston before it dropped down into the crank again and finally grenaded everything. The best part is that I was making 60 psi right up to the time it locked up. I'm still trying to figure out how to post multiple photos on here but here's one.

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Where is the number 7 rod? That round chunk in the middle is the cam gear and 2 lobes.

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Thanks. The initial knock started when I decided to hold it on the wood comin around the back side of the shop sideways the other day. Then it got progressively worse until she Locked up tight at idle going from
 
Finally started on pulling apart the suburban. If anyone wants parts, pm me. Otherwise it's gonna sit until I scrap it. Motors gone but I could be convinced to get rid of the rest. Not trying to sell it but if someone on here needs parts, it's a 99 K2500
 
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