Replacing 350 vortec have questions!

[oldschool98]

Hello, so I'm replacing the stock chevy 350 vortec. I'm replacing it for a chevy 350 vortec long block, bored .30 over with an rv cam. Do I need to do anything to my computer??? Is it going to cause me problems??? I'm hoping someone can give me some advice thanks.

[barry G]

in the old rv cam (those were made in the 70s), the claim to fame was needing nothing more. Not even a stall convertor.

maybe exhaust after the headers. the 350 vortec exhaust is big to begin with, factory works fine.

 

I would even slap the old LT4 cam, and do nothing extra.. even in the 305.

Vortec self learns the feeds.

 

the factory cat might trigger the 420 code.

[oldschool98]

Thanks for the reply sir, the cams already in and the new motor is halfway done, the rv cam in there now is from summit racing, and like I said it's bored .30 over. The next thing I was gonna do is the exhaust and out shorty headers on it. Get that 25% more power. But I'm hearing this computer is going to mess it all up. I'm not sure what to do. Some people said as long as it's not a choppy cam, I'll be okay, others are saying it's a big deal and you have to get it tuned.