I have a 97 2500, contemplating putting a 4k gsk on it what else would be good to do along with it?

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install them and enjoy. if your truck actually revs to the 3500rpm range then install heavier valve springs.

 

Alright thanks

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If you are driving an auto, it is most likely going to want to shift at or around 3K, the only advantage to you in an auto that I have seen with the 4K spring is that you know you will have full fuel up to the point the transmission will want to shift, where as the 3K gsk will be out of fuel just before that point. I love the 4k in my manual as it allows me to run a little further into RPM in a lower gear while towing to keep momentum on hills etc.

 

I too will be looking to get 4K's in my truck ... my trans now shifts great, now I can worry about cutting down my Et when it comes racin time ..

 

I have the 5 speed so the shifting is not a problem. Sounds good..

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Lol.. Yeah, wish I had a 6 spd..

 

I wish that every minute of every day that it isn't snowing. I need to move south...

 

Isn't the 6th gear in the nv5600 the same ratio as the 5th in the nv4500 ?

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no the NV4500 was .75 and the 5600 is .73.. close but a few rpm's different