I have decided to go the LT1 route. I have the money for headers, and exhaust. When I put this manifold on I would like to change either the cam-valve springs OR 1.6 rr's.

I do not have the money for both.

If a get a cam the lt4 Hot cam is my first choice.
OR
Crane 1.6 rr's

No head work, L98 style engine.

I would like to rev to around 6k hopefully the engine will still make power at this point.

Any input hopefully from people who have had this experience.

 

You're putting a converted LT-1 intake onto your original TPI engine?

If so, I'd change the valve springs and rockers for your first move. Stock valve springs are no good at higher RPMs, even with a stock cam. And the LT-1 intaike will make the engine a lot more "willing" to go into the upper RPMs even with the stock cam. And certainly higher ratio rockers will make even the stock cam act slightly "bigger" than it did with 1.5s.

A cam and valvestpring change would also be a good upgrade but I'm thinking that you might not get all the "goodness" you expect without some chip tuning (which is costly if you can't do it yourself).

It's a pretty tough decision, but I'd stick with the stock cam for now if you have to run it with the stock chip. Just the manifold change alone will throw the tune off a little. Add a cam change on top of that and I think the factory programming is going to be pretty far from ideal.

 

As if the factory programming were "ideal" when it left the factory?