mack1928 Posted March 22, 2013 Share Posted March 22, 2013 I can buy a 1984 Mack RD 688sx in great shape with about 140,000 miles and about 5200 hrs has a 14 ft bristol donald body. the truck has a newer mid 90s 300hp engine with the 5spd high low two stick tires are fair 1200 R24 I was thinking of making it into a tractor to pull a low boy around what do you guys think?? Or do I buy a 2004 cv713 with 350k miles real clean also with a 400 8LL which is a tractor already idk? price difference when all said and done about $10,000 difference to buy the newer truck. Quote Link to comment Share on other sites More sharing options...
2stacksuperdog Posted March 22, 2013 Share Posted March 22, 2013 I think you better off with the 84. Putting a fifth wheel on costs a lot less than $10,000. A 300, 6 speed should have enough power to move anything and it a r-model with only 140,000 miles which is less than half of the CV Quote Matt Link to comment Share on other sites More sharing options...
Timothy Maikshilo Posted March 22, 2013 Share Posted March 22, 2013 I think you better off with the 84. Putting a fifth wheel on costs a lot less than $10,000. A 300, 6 speed should have enough power to move anything and it a r-model with only 140,000 miles which is less than half of the CVI agree nice looking RD and would make a great addition. Quote Link to comment Share on other sites More sharing options...
Jdiesel25 Posted March 22, 2013 Share Posted March 22, 2013 I have a few rd triaxle dumps n I also have a few granite dumps and I personally prefer the r models Quote Link to comment Share on other sites More sharing options...
felicello122 Posted March 22, 2013 Share Posted March 22, 2013 R model all the way Quote Link to comment Share on other sites More sharing options...
terry Posted March 22, 2013 Share Posted March 22, 2013 Bet the older mack will be alot less trouble! Quote Link to comment Share on other sites More sharing options...
David Posted March 22, 2013 Share Posted March 22, 2013 Electronic vs mechanical is a no brainer. Take a serious look for rust. Especially between the rails if it's a double frame. Quote Link to comment Share on other sites More sharing options...
mackniac Posted March 22, 2013 Share Posted March 22, 2013 1984 = real Mack almost problem free2004 = half real Mack and all sorts of electrical and electronical gremlinsbut as usual money talks 1 Quote Makniac , collector and customizer of die-cast model in 1/50th scale Link to comment Share on other sites More sharing options...
RFCDrum Posted March 22, 2013 Share Posted March 22, 2013 You should buy it if you are going to make it into a tractor. It won't see as much use as if you left it as a tandem. You can't beat that drivetrain. Cheers, Rob Quote Link to comment Share on other sites More sharing options...
mack1928 Posted March 23, 2013 Author Share Posted March 23, 2013 Yea the r models are so reliable I've had many same exact spec I just wanted to see if any real differences pulling a low boy verses lugging 25 ton or a tag I'm sure it's enouph power for the job my only issue is going back in time I've been buying new stuff and have had very good luck this far but if u don't have a huge budget for something this is prob my best bet to go with the r model 1 Quote Link to comment Share on other sites More sharing options...
Popular Post RFCDrum Posted March 23, 2013 Popular Post Share Posted March 23, 2013 You know you want to buy it. It's the big boobed devil girl on your shoulder whispering in your ear. 3 Quote Link to comment Share on other sites More sharing options...
jaysm35a2 Posted March 23, 2013 Share Posted March 23, 2013 Id go with an RD, Id like one as a road tractor myself Quote Link to comment Share on other sites More sharing options...
mack1928 Posted March 23, 2013 Author Share Posted March 23, 2013 yea I think I will now makes the most sense Quote Link to comment Share on other sites More sharing options...
TozziWelding Posted March 23, 2013 Share Posted March 23, 2013 I vote for the R model, I swear the old 350 powered R has more balls than the CH with a 427 we use. 1 Quote Link to comment Share on other sites More sharing options...
2stacksuperdog Posted March 23, 2013 Share Posted March 23, 2013 I vote for the R model, I swear the old 350 powered R has more balls than the CH with a 427 we use.Our E-6 350 out runs our 350 e-tech any day of the week Quote Matt Link to comment Share on other sites More sharing options...
mack1928 Posted March 23, 2013 Author Share Posted March 23, 2013 The 460 in my trucks are fast but over kill for what i need in this tractor Quote Link to comment Share on other sites More sharing options...
RFCDrum Posted March 23, 2013 Share Posted March 23, 2013 Just buy it you freak. Put some straight pipes on her extensions on the gear sticks with some 8 balls on them. Quote Link to comment Share on other sites More sharing options...
mack1928 Posted March 23, 2013 Author Share Posted March 23, 2013 lol gonna make the deal tomorrow! 1 Quote Link to comment Share on other sites More sharing options...
2stacksuperdog Posted March 23, 2013 Share Posted March 23, 2013 Just buy it you freak. Put some straight pipes on her extensions on the gear sticks with some 8 balls on them.Extensions on the gear sticks? by that i hope you don't mean shifters that you hit your hand on the ceiling. Straight pipes sound good though Quote Matt Link to comment Share on other sites More sharing options...
VPZINC Posted March 23, 2013 Share Posted March 23, 2013 R model FTW! My 87 with a 300 in it can smoke my 06 cv713 with a 460 in it. Quote 87 RD 686SX07 CL-73306 Granite CV-713"Old Macks never die, just get new generations of drivers" Link to comment Share on other sites More sharing options...
RFCDrum Posted March 23, 2013 Share Posted March 23, 2013 Extensions on the gear sticks? by that i hope you don't mean shifters that you hit your hand on the ceiling. Straight pipes sound good thoughYou gotta make them a little taller they are always too short. Billiard balls or plastic repros make the best shift knobs. Quote Link to comment Share on other sites More sharing options...
2stacksuperdog Posted March 24, 2013 Share Posted March 24, 2013 You gotta make them a little taller they are always too short. Billiard balls or plastic repros make the best shift knobs. Ok i asked just because some of the guys around here with the KWs and Petes have shifters in them that hit the ceiling almost Quote Matt Link to comment Share on other sites More sharing options...
mack1928 Posted March 24, 2013 Author Share Posted March 24, 2013 We will restore that truck prob just to factory nothing fancy maybe a chrome air cleaner cover that's about it we always want themClean and neat and ready to work!! Quote Link to comment Share on other sites More sharing options...
RFCDrum Posted March 24, 2013 Share Posted March 24, 2013 Ok i asked just because some of the guys around here with the KWs and Petes have shifters in them that hit the ceiling almost No not to the ceiling but I like them a little taller. The tri axle I drove for Gulino when he put the 18 speed in her we couldn't get the right gear lever. It was back ordered forever so we put a stick from a Granite in her. It was taller and had that funky bend on it but it worked out pretty good. Had nice short throws on it. Rob Quote Link to comment Share on other sites More sharing options...
mack1928 Posted March 24, 2013 Author Share Posted March 24, 2013 I had a 6" extension in my 89 RD690SX I personally didn't like it and took it off eventually before I sold it the throw on the shifter was to sloppy to me lol! Quote Link to comment Share on other sites More sharing options...
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