Re: 1968 C10 5.3 swap, the easy way.
 

very nice.

Re: 1968 C10 5.3 swap, the easy way.
 

This retired guy says thanks for this post. I am going to do the same for my 67 Short bed. Since I had not a clue where to begin you can imaging how helpful this is.

Re: 1968 C10 5.3 swap, the easy way.
 

Thanks for sharing all your information with us, nice work!

Tell me about, the I think you said 4 wires from the relays to the "Truck" where and what are these wires connected too?

What are you using for a speedometer?

Re: 1968 C10 5.3 swap, the easy way.
 

Awesome build. I can't wait to start mine after seeing this. I am swapping mine out of an 02 silverado so I am hoping to use most of the factory parts.
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Re: 1968 C10 5.3 swap, the easy way.
 

LQ4 dyno at 311 hp and 380 tq. The truck intake killed power and wouldnt make anything passed 5100 rpm.
Update.. The truck intakes are fine. The camshaft holds the power way back. Installed a new cam and I have so much more power and so far the gas mileage is the same. Actually got a few mpgs better.

Re: 1968 C10 5.3 swap, the easy way.
 

not sure that was your problem as lots of guys are making power past that point with the truck intake...could have been your cam.

Re: 1968 C10 5.3 swap, the easy way.
 

Yea I agree. Im trying to find a stock lq4 dyno graph to compare it. Its either the cam and/ or valve springs.

Re: 1968 C10 5.3 swap, the easy way.
 

It's the cam and valvesprings. I didn't read the whole thread. Is the valvetrain all stock stuff?

Re: 1968 C10 5.3 swap, the easy way.
 

I just put in a 6.0 lq4 with 799 heads with yellow springs.

Re: 1968 C10 5.3 swap, the easy way.
 

ahhh.......cam is stock then. That would be a limiting factor. That said...your dyno numbers are good. Wouldn't think you'd be getting valve float with those springs in the low 5000rpm range but I'm not familiar with their specs.

put a .550 to .600 lift cam in it with duration in 210-220/220-230@.050 range...along with a nice set of .650 lift dual springs and some c-moly p-rods to keep it together and watch it wake up!

Re: 1968 C10 5.3 swap, the easy way.
 

Yep, a TSP sleeper 220 cam with dual springs and hardenend pushrods will wake that baby up to about 380 hp.

Re: 1968 C10 5.3 swap, the easy way.
 

Very nice truck!

Where did you get the LED gear indicator?

Re: 1968 C10 5.3 swap, the easy way.
 

I bought a LED at radio shack and rigged a mount for it.

Re: 1968 C10 5.3 swap, the easy way.
 

Just soldered to the factory wire?

Re: 1968 C10 5.3 swap, the easy way.
 

Gas mileage update! The 6.0 is getting MUCH worse gas mileage than the 5.3. I didnt think it would be a big difference but it sure is. getting like 14mpg :(. Its been tuned by two of the top tuners in the US as well. I baby it as well. I wish i never put it in. My 5.3 got at least 18 in town. Also I thought i would notice the torque increase around driving around town but its not that huge of a increase.

Update. The factory 6.0 needs a bigger cam in it. I did this and I enjoy the 6.0 now.

Re: 1968 C10 5.3 swap, the easy way.
 

I just ran it to ignition hot wires behind the dash.

Re: 1968 C10 5.3 swap, the easy way.
 

Gives it a nice little touch. I like it.

Re: 1968 C10 5.3 swap, the easy way.
 

I am at that stage now so I am waiting for pic.

Re: 1968 C10 5.3 swap, the easy way.
 

Did my first autocross run this weekend! Felt strange pushing the ol truck around on the course. Truck held together!

http://youtu.be/LgogK_FevgM

Re: 1968 C10 5.3 swap, the easy way.
 

thats rad

Re: 1968 C10 5.3 swap, the easy way.
 

Looks pretty frisky when you got the chance to put your foot in it and was pretty flat through the twists. Bet it was fun. Nice job.

Re: 1968 C10 5.3 swap, the easy way.
 

Thanks! For suspension I just have a large sway bar in front with airlift bags inside all 4 coil springs. I was shocked it handle so nice. I was just worried something would break if I pushed it hard. It also has a new cam in it which gave it so much more power.

Re: 1968 C10 5.3 swap, the easy way.
 

Subscribed!

Re: 1968 C10 5.3 swap, the easy way.
 

I just noticed you're in Vegas... You should come by the weekly car show/meet on Sundays. There are a couple 67/72 trucks that show up, one is a member here and has an LS1 swap.

Re: 1968 C10 5.3 swap, the easy way.
 

I just found your post. I have a 1971 c10 and thinking about doing the conversion . I can get the engine and transmission and all acc. and harness and computer . all i would need to do is give the fuse box from the donar engine 12v and everything should work. Ware are the speedo and tach taken from?