3500 swap help.
 

im trying to find a list and cannot find one. im looking for info on wahts needed to swap it over. al lthe parts needed etc. the issue im running into is all the threads i read are incomplete or are missing huge amount of info.

so far i know i obviously need both intakes and an adaptor for a new throttle body correct? intake gaskets and botls are a givin. anything else?

Is this a full 3500 swap or just heads

whats the benifit of swapping heads too? is it nessasary?

I ment intake manifolds.. Are you swapping the whole engine or just the tops

just the intakes. sorry my bad for the lack of a tittle.

Read this: http://wot-tech.com/shop/articles/sw...ne/cat_80.html

And this: http://wot-tech.com/shop/articles/34...d/cat_104.html

So after reading that i have this to ask. do you guys think the 3500 intake swap is worth it? im not planning on forced induction or anything. would i just be better off porting and polishing 3400 intakes?

http://wot-tech.com/shop/gm-60v6/350.../prod_297.html


this is the package i am going to be buying.
or this one

http://wot-tech.com/shop/gm-60v6/340.../prod_273.html

the stock 3500 wont outflow a well ported 3400 but a ported 3500 would be best

why is that. give me the science behind that plz.

i would go with the stage 1 3400 package it is a lot of money but it would be worth it.

final500alero309
 

I was looking into that also, just put my cat back on today

I know a lot of you here are all about WOT, but my money is still on Milzy... lol

The heads are necessary if you want the 3500 LIM too, it won't work with 3400 heads. But a 3500 plenum will work with a 3400 lim

Look at the heads the stock 3500 flows less cfms than most ported 3400 heads... Plus you could put the money that you would put into the heads into some lsx valve springs and retainers.


Milzy all day

Springs and retainers are cheap. Honestly, unless a cam is in your plans, changing springs and retainers isn't really necessary.
A good set of ported 3500 heads is better than a good set of ported 3400 heads. Flow is one part of a quality set of heads; it's not the only consideration.
I've had 2 sets of ported 3400 heads - one good, one great. In the works is a set of killer ported 3500 heads.

If your porting the 3500 heads than hell yea get them. But if its between stock 3500 head swap or well ported 3400 heads than 3400 for sure.

If your going to buy ported 3400 heads then why not just buy ported 3500 heads instead? I don't think the OP posted anything about buying heads or having his current ones ported at all...but I may have missed something seeing as I'm on my phone.

Because Buying 3500 heads also means buying a swap kit

No it doesn't. The 3500 heads and lower only require 3500 intake gaskets and a CTS extension with the stock 3500 CTS. Keep the 3400 upper, fuel rail, regulator, and injectors. 8mm Rockers will also be needed if you don't have a 2003 and newer motor (some 2002 as well).