
400+ ft/lbs of torque stock, skads of torque at idle, and get at least in the mid teens mpg in a good sized 4x4...yep, find a gasser that'll do that.



That looks like a good build, but I can not figure out why you would put so much work into running a 6.5 diesel. I thought the power numbers were pretty low on these vs. a nicely built gas engine. Is the H1 diesel different from the other 6.5's?
Anyway, good luck with the build. It looks like you are making a lot of progress.
considering this was a factory new drive train with less than 5000 miles that I picked up for less than half the cost of a new atlas t-case I think it was pretty good deal!!
hey so are you pretty happy with the way the liner came out? i need to do that to mine too.

I don't think a diesel swap would fly for either of my trucks in California, but I have dreamed about a Dmax for the pickup.
stoked on the liner!! it was easy peasy! I had melia help roll it out "she loves helping out dad"!!
That's pretty cheap. I spent $5000+ to rebuild my 350 into a CA smog legal 383 pushing 400 ft/lbs + torque. When hauling a 21' toy hauler trailer with tool boxes (filled) and ladder rack on my truck (estimated 15,000 lbs total), I get 5 mpg. When driving for work, without a trailer, I get 8-10 mpg. My truck has a built Th-400 and a GearVendors overdrive that I installed. I would hate to pull my trailer without having the use of 6 forward gears. I went with aluminum heads and a bunch of other nice stuff. I pulled the engine and had a good builder complete the engine from intake to oil pan. I put the water pump, header, and other accessories back on myself. I put all of my money into the parts and critical work and did the rest myself. It was well worth what I spent on it, but I am considering a low mileage 6.0l gen III for my 88 K5. The H1 diesel looks like its well suited for your rig.
Is the H1 6.5l the same basic engine as the one found in pickups? I did see that turbo is different. I don't think a diesel swap would fly for either of my trucks in California, but I have dreamed about a Dmax for the pickup. I'm a bit jealous that you have the time and space to do a project that detailed. How much of the build have you had help with vs. working by yourself?
Keep up the good work![]()

85-m1028,
Are you going to referee your truck then? I saw that it is a 75. I hear that 73 was the cut off, but up to 75 may not require smog. Just curious if you will skate by that one. I wanted to do a 1996 454 from a 3500 c&c truck, that I could have bought dirt cheap, into my 88 k5. I asked a referee and found out that since the blazer is a half ton I would have to use half ton emissions. The 454 ss trucks were half ton. The referee said I had to meet obd I just like the 454 ss. The bad part was that by 96 or 97 everything was switched over to OBD II. Referee said no go. The multiport obd II would have been more work, but a better running engine, with more power. I'm not sure if a stock 454 OBD I would give me the performance that I want, especially for all of the work involved.
Since tbi seems to be fairly limited for power I am leary of trying to get 400 hp/tq out of a 383 fed by a tbi setup that passes smog. If my blazer wasn't so nice I would buy something pre smog or at least carbed like my 79. Is it true that you can not replace an original engine with a smaller late model engine (eg. replace 5.7 with a 5.3 gen III)? If that is the case I would have to go 6.0 gen III, although I want as much power as possible. The 6.0 should give me close numbers to my 383 for power but better mileage. Also, I could chip or supercharge the 6.0 and keep it legal. Now I have the diesel option to think about since you mentioned that it is legal.
Since you are doing a swap, do you have any good info on where to pickup a good 6.0 short of just buying a wrecked truck, and have you heard of a bracket to relocate the AC pump on that engine to avoid cutting the frame rail of a K5? Also if you have any links to info on the H1 diesel I would love to check those out.
I live in the IE and travel to the OC (55 and Katella) for work sometimes. I would love to check out your ride if we ever happen to be in the same area. Thanks for sharing all of your work with us, and I apologize if I am pulling your thread off course. I have given the swap for my blazer some though, but have not really talked to anyone who has experience doing it. The more I can learn the better.
85-m1028,
Are you going to referee your truck then? I saw that it is a 75. I hear that 73 was the cut off, but up to 75 may not require smog. Just curious if you will skate by that one. I wanted to do a 1996 454 from a 3500 c&c truck, that I could have bought dirt cheap, into my 88 k5. I asked a referee and found out that since the blazer is a half ton I would have to use half ton emissions. The 454 ss trucks were half ton. The referee said I had to meet obd I just like the 454 ss. The bad part was that by 96 or 97 everything was switched over to OBD II. Referee said no go. The multiport obd II would have been more work, but a better running engine, with more power. I'm not sure if a stock 454 OBD I would give me the performance that I want, especially for all of the work involved.
Since tbi seems to be fairly limited for power I am leary of trying to get 400 hp/tq out of a 383 fed by a tbi setup that passes smog. If my blazer wasn't so nice I would buy something pre smog or at least carbed like my 79. Is it true that you can not replace an original engine with a smaller late model engine (eg. replace 5.7 with a 5.3 gen III)? If that is the case I would have to go 6.0 gen III, although I want as much power as possible. The 6.0 should give me close numbers to my 383 for power but better mileage. Also, I could chip or supercharge the 6.0 and keep it legal. Now I have the diesel option to think about since you mentioned that it is legal.
Since you are doing a swap, do you have any good info on where to pickup a good 6.0 short of just buying a wrecked truck, and have you heard of a bracket to relocate the AC pump on that engine to avoid cutting the frame rail of a K5? Also if you have any links to info on the H1 diesel I would love to check those out.
I live in the IE and travel to the OC (55 and Katella) for work sometimes. I would love to check out your ride if we ever happen to be in the same area. Thanks for sharing all of your work with us, and I apologize if I am pulling your thread off course. I have given the swap for my blazer some though, but have not really talked to anyone who has experience doing it. The more I can learn the better.