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Howdy howdy. I’ve heard that swapping a 5.7 vortec into my 96 4.3 is a really easy swap (well as easy as swapping an engine gets) does anybody know what is the biggest cam I can throw into an l31 without needing a tune? I heard I can put an lt1 cam and get like 10-20 horsepower and around 20 pounds of torque but I’d like to go a bit bigger if possible. Second question how do I do the wiring? I have 0 clue what to do for that. Is it also possible to swap it in without having to shorten the driveshaft? Thank you guys so much for putting up with my repetitive questions you’ve probably heard thousands of times
 

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Any cam change should be followed by a good dyno tune. You're leaving power on the table if you don't do it. Heck even your stock engine will pickup power with a tune. Not a mail order one, a real one done on a chassis dyno.
Granted they aren't cheap, but you are not only buy the tuners labor, you're buying his knowledge and experience. It would be beneficial to probably do a 0411 swap at the same time as the engine. They are more tuneable than the black boxes. Especially the early ones like 96.
 

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Discussion Starter #5
Any cam change should be followed by a good dyno tune. You're leaving power on the table if you don't do it. Heck even your stock engine will pickup power with a tune. Not a mail order one, a real one done on a chassis dyno.
Granted they aren't cheap, but you are not only buy the tuners labor, you're buying his knowledge and experience. It would be beneficial to probably do a 0411 swap at the same time as the engine. They are more tuneable than the black boxes. Especially the early ones like 96.
I don’t even know if there’s any dynotuners where I live, if there’s is it’s gonna be really expensive that’s why I’m so hesitant on it. I would not even doubt it if it’s around 1000$+. What vehicles did the 0411 computers come in? I know they came in the later s10’s which I might be able to get one for free but then I’d hate to pay for the reprogramming. This is a budget build and I have the usual highschooler budget
 

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If you're working on a high school budget. Forget any cam. It's going to take every penny you have to just get the L31 in it. Keep in mind when Harley, MadMax, and others, including me, talk about an easy swap we've done many of them over many years.
When I was in high school I attempted 3. 2 were failures and my Dad eventually had them hauled away to the crusher. If I had only had more money and experience I'm sure I could have finished them. But as your typical High school student both were lacking. Thankfully my parents put up with the constant mess in the garage while the family car sat out in the snow.
The third was a barely successful 348 in place of a 235 in a 61 Bel Air. Since the 348 engine was available in the 61 I guess you could say it was an engine replacement and technically not a swap. But I spent a lot of time in junkyards finding the correct parts.
While I was in SEA my Dad junked that one too.
 

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South East Asia. To get there us zoomies flew over the sea.
 
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