Thread: 1972 Chevy K30 Longhorn Build

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Sorry for the blurry pics. My phone wasn't happy about the drizzle.

I also got the engine breather relocated, and the LH battery hold down made and installed. This thing is done and gone until he comes up with some green backs.

I'll bet you're glad to see that one gone!
Does all that piping and stacks offer any hp gain? Or, just noise and raising the exhaust stream into my windshield???


I know we're hot rodders and we gotta look cool and all but.....

Originally Posted by 34_40

I'll bet you're glad to see that one gone!
Does all that piping and stacks offer any hp gain? Or, just noise and raising the exhaust stream into my windshield???


I know we're hot rodders and we gotta look cool and all but.....

No HP gain at all. It probably hurts it more than helps it due to the 3"-5" garbage. I tried talking him out of it but he had to have these stacks and tail pipes...... Ok....

No HP gain at all. It probably hurts it more than helps it due to the 3"-5" garbage. I tried talking him out of it but he had to have these stacks and tail pipes...... Ok....


yeah, that's what I thought..
We were all young once right?..

Nice to close that chapter, to each their own but I never have cared for the stacks out the bed of a pickup thing. Seems like lots of people like it though.

I guess some never haul full sheets of plywood, plus they like to hear their own exhaust.

Originally Posted by firebird77clone

I guess some never haul full sheets of plywood, plus they like to hear their own exhaust.

Most of these people don't have trucks to use as trucks. They just want one to have one I guess. This guy is having issues with the truck lugging at 70mph. Yep, 40" tires. stock 3:73 gears, and a large single turbo=Wrong RPM range and more head aches. But it looks cool?

What rpm is he turning at 70mph with those tires??

Originally Posted by jerry clayton

What rpm is he turning at 70mph with those tires??

Assuming 1:1 final trans gear ratio, 2,193 RPM. If it's an OD trans, the revs would be less.

I haven't driven it so I'll have to use a program to calcuate it. Plus, his instrument cluster is for a gas truck, not a diesel, and the tach reads around 500rpm off. He has been using his edge cts to monitor RPM's. But he never gives an rpm number when he calls me telling me what it is doing. Haha

It has a 4R100 trans, and OD is .71. So it's around 1558 since the tires are worn it could be a little more. That is well under the turbo RPM range. He's working on getting different tuning to change the trans shift points, but that isn't going to help. It needs different gears or smaller tires. Part of the draw backs of going with an aftermarket turbo.

Figures-most of those trucks had 410 gears and much smaller tires-------

Yes sir. That's how my 95 2wd F350 is. Poor thing.

I had a 1995 with 3:55 gears--was great
1999 has over 500,000 miles and just put 2017 aluminum bed on it plus some 2007 Harley doors

This weekend I decided it has been too nice out to not be driving something old and cool. So, on Saturday, I drug out another front axle I had and brought it home so I could rob the knuckle off it to use on mine. (I'm going to send mine to the machine shop and let them have the fun of drilling out the broken studs.) While I was at my parent's place I got the corvette out and washed the dirt and bird poop off it. I found that it had oil coming out of the exhaust. After I washed it when I went to put it back, there was no more oil coming out. It had to be one of the turbos. That will be work for another day. That is just another good reason to not let something sit for a long time and do nothing with it..............

I didn't have time to get the 72 tore apart before we left to go out for supper for my B-day. We went to Sully to pick up some friends to go with us. My friend text me letting me know to be careful in town because it was Prom night and all the kids were out in daddys car tearing the town up. Apparently the town allows the kiddos to drive around town so they can parade around their clothes and rides. At 6 o clock they drive through a destined route up to the school where they get out, take pics, and the parents park their vehicles for them. Pretty cool IMO. There were a lot of cool rides running around. 67 GTO with a blower, 70 nova, 73 T/A 4 speed car, a cool old scout, an IH rat rod, some newer mustangs, a Z06 vette, and of course the diesel trucks.

Sunday I had to do my yard work and once that was done I was able to get the knuckle removed from the 72 and I also stole the one from the donor axle. This morning I cleaned up the donor knuckle and steering arm/top plate. I installed new seals and king pin bushing, and got the knuckle back on. Tomorrow morning I'm hoping to finish it up before the rain moves in. I decided to go with a different drag link and eliminate the steering block. Less stress than the block, and cheaper than the cross over steering. I really just needed to get this truck back together so I can use it. I need to haul scrap, garbage, and who knows what else.

Yard work... uuugghhh.. LOL..

Our grass just turned green over the last 7 to 10 days and it'll need cutting. I'll drag it out 'til next weekend. 8-)