man-o-war

This ^^^^^

Who sells s13/s14 motor mount adapters for GM engines??

Birdracing

I have a 5.3 litre also my plan was to go with a carburator but I was given a LS1 intake, throttle body, and a GM hotcam for free so you would have to be nuts not to go fuelinjection.. I have a set of 706's which I am going to get checked I know about the problem with them cracking. With the hotcam and a set of headers, with a 3600 stall and a 4L60E tranny with a set of gears, i'm hoping to make 400h/p with any luck.. I am planning on putting this in a Mustang, it will be my DD, and proably a appearance at the track to get a timeslip. I think these motors are underated big time.

superdave84

Super Chevy did an article on this that you might be interested in....

http://www.superchevy.com/technical/...s/viewall.html

Note that the LS2 went to 462hp with just a set of long tube headers. I just bought an LS2 and I haven't dynoed it but I have the headers, a performance tune (20hp, according to the guys at PCM Performance), and I built a cold air intake (10hp, give or take). Add that up and you get 492. Now of course I don't expect nearly 500hp for REAL...but 450, 460, yeah probably.

Pop N Wood

iTrader: (1)

Something to think about but an LS2 already has those heads and cam. Plus a 4 inch bore to help airflow and a number of bottom end improvements. A bit more money up front but might be cheaper once everything is included.

And yeah, cam swaps can add up price wise. Not sure why guys are talking studs and gaskets, why do the heads need to come off?

ctd450

iTrader: (1)

LY6 or L92 with a cam and tune can make 450 HP easily. You'll spend more up front buying it, but less in the end building it.

ZR2_350

Well this may be an old thread, but I must chime in because I found it so others will also.
A good cam will cost you around 400... even a mild cam...springs another 200... I would advise against a LS6 Cam or even a LQ9 cam for your 5.3, both will only yield you 370-380 hp on motor.. the LS3 cam will get you about 420 HP... Some cams also require the use of 1.8 Rockers... The highest HP from a stock LM7 with just a cam swap is about 430. Heads will only yield you about 30 Hp. This is considering all other variables... Don't forget some cams will require a convertor swap also...

Ragna

im making a little over 350whp with my ls1 and all I have on it is a SLP lid with SLP CAI, hooker headers 1 7/8th, and a custom exhaust 3in but I also don't have to pass emissions so I have none of that stupidity. If I cared to add the cam and kit I have id probably be in the 425ish area but im going to a 5.3l turbo so I need a new cam anyways.