They have it for sale at www.paceperformance.com 2,285 for 94-95 and 2,329 for 97-97. It comes with
lT4 heads with valves and springs. LT4 manifold, HOT Cam and 1.6:1rr's and all necessary gaskets. Has any one bought this yet?

 

Too much money for too little power, IMO. I would look at getting a set of well ported LT1 castings with a matching cam if I were you.

 

most of the members are going to tell you to go with ported stock heads and a cam. I have less than 2300 in my heads and cam for sure and it would kill that LT4 set up.

 

would you rather get the Conversion Kit or a Supercharger??

 

can you buy just the heads, if so do that and have them ported, and match it to your intake and get like a cc306 cam and youll be doing some serios damage to the street.~gunter

 

Always better to go with a heads/cam kit instead of a supercharger on a stock short block. Better gains, less headache.

 

Word.

A high compression NA motor + supercharger doesnt always work out the best. Yeah itll work, but it wont be optimal and can cause problems. Go the heads and cam route.

Stock castings go for $200 in the for sale section all the time. I'd pick up a set to get worked on and a cam anyday before getting that LT4 conversion.

 

Too bad lt-4 heads won't fit an LT-1 intake

I highly doubt a lt-4 kit will give you 425 hp anyways. Get your heads done at Skarodoms, do a good set of headers and a cam, you'll be well above the 400 hp mark

-Shannon

 

I think the kit is more reliable than a supercharger. It would be nice to have 425 Hp all motor

 

What the?

Intake
Heads
Cam
Rockers / springs

Is this *really* going to add 150HP? Something just doesn't seem right here.

Stock LT1 - 275HP (right?)
LT4 upgrade - 425HP

 

I don't know where they get that 425 figure. LT4s make 330 hp if I remember right. Give it maybe 20 more with the hotcam. Where are the extra 75 hp coming from?

 

425 at the flywheel....330 rwhp...

 

Damn!!! That is a big drop from the crank to the wheels! Not all are like that are they?

 

Actually shouldnt it be around 360 to the wheels assuming a 15% driveline loss?

425*.85 = 361.25

 

360 rwhp maybe with the HOT cam as well...not with just a pair of LT4 heads, intake, cam, etc