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After doing research for the better part of the year on engines, I have decided on the following...for now. I am sure the list will grow and get tweaked a little. Scat crank Mahle pistons Head studs Clearwater cylinder heads, maybe GEP (we'll see) Duratherm glow plugs Bosch hi output...

On the 4.56's I am going to run 37" tires. I should know more about the block on Friday.

So I have been working on my 1985 Chevy K30 Crew Cab Short Bed conversion now for about 8 months. I finally decided to stay with the 6.5L motor and having the axles fitted with 4.56 gears. So unless a complete rebuildable "599" motor comes my way I found a "599" short block at one of the local...

No doubt, the Cummins is a good engine. If you like the sound of a tractor. :) And no doubt that any used diesel engine can be a crap shoot. At the end of the day I may very well just get a new motor and be done. What I have learned in my life is that everyone has an opinion. Each of us has...

Looking forward to the results. Plus John is going to need some company. He's going to get a rash from the "C" crowd for twisting my mind. :)

After my rear axle gets built, then the Dana 60 gets worked over. Then my spring set needs to get built and hopefully by the Fall I have a rolling chassis. Then I can start working on the drive train. There is a motor available here in McCall but we shall see on that one. I am leaning real...

UPDATE! For those following my indecision and inability to make up my mind between a Cummins 12v and a 6.5L TD, I decided...on a 6.5L. I ordered a 4.56 gear set for the 14 bolt and hopefully in a couple of weeks that will be ready to pick up and then drop off my Dana 60. There is a guy here in...

From guys I know on other b oards, the Cummins and specifically a VE pump 12v in a Chevy with 37's is happier at a much lower rpm, say 1800 - 1900. I know several who have 4.10 gears, running 35" tires and double overdrive.

Working off of Grimm Jeepers gear ratio calculator, this is what rpms I come up with 4.56 gears and 37" tires. 1:1 OD 55 mph 2278 1708 65 mph 2692...

What I should have asked is what rpm does the 6.5 like to cruise at and for best mpg. Gear ratios are dependent on tire size, purpose, etc.

This rig will be more of a daily driver. I may even move down to 35" tires with only a 4" lift. 4.56's seem awfully short.

NV 4500. My understanding is that the 6.5 likes to run at a somewhat higher rpm than say the Cummins. With a NP 241 transfer case and the low first gear, crawling speed and/or towing a load out of woods at slow speed is an issue. But towing at highway speed might as well as the optimum rpm for...

Well I am back leaning toward putting the 6.5 in my 85 Chevy Crew Cab. I am looking at running 37" tires. I know with the Cummins 12v, 3.73's would be fine. But what about the 6.5. I am looking at getting 250 hp out it. I have run the numbers through some of the gear ratio calculators. I plan on...

I was looking forward to being there! My daughter looked at me kind of funny when I suggested she ride the bus. Actually she had tears in her eyes because she thought I was serious. Guys have fun

No. On your 6.5 build. Are you modifying the air box, or Banks manifold, etc. ?

How are you handling the air box/turbo conflict?

If my 85 was a complete truck, I would agree with you. However, since this is a frame-off restoration I think in the end a Cummins 12v 1st gen motor is going to go in. The nice thing about these motors is the dynamic advance.

Thanks. I stand corrected. As much as I don't want to, it would seem that the 6.5 install in my truck would be harder than a Cummins. First is the obvious. The airbox is in the way. Second is that the 6.5 drivers side exhaust manifold conflicts with the slave cylinder. Then there is trying to...

Your right. The 1st gen motors were not intercooled. I was planning on using a 2nd gen intercooler. I would like to keep my truck all GM. I have this uneasy feeling about using a rebuilt "599" block. I could possibly get a takeout engine for about $2,500. I like the sound of the V-8 diesel.

Supposedly forged crank and 18:1 pistons. As I work on my 85 crew cab, there is a complete 1st gen Cummins 12v available with both injector pump and turbo for $1,350. But in the end to make the Cummins work I need to put in a Dodge radiator, Dodge intercooler, Dodge bellhousing and probably a...