Here is your answers to an extent:
Intrepid = no aftermarket
So your desire for heads, cams, valves, cranks, pistons etc performance wise are all extinct the only ones you'll find are the OEM replacements. Eventually after college I'm going to yank the tranny and engine. Get together with all my buddies and just have custom stuff built to see what we can get out of it.
Autozone = crackheads
For 3.3 power ratings, 93 was 153 hp, 94 to 97 was 161 hp. I'll quote Chrysler in what they said in 94 for their reason in power increase "The Intrepid standard 3.3-liter engine features a revised cylinder head and camshaft which results in an eight horsepower and four pound-feet of torque improvement."
Your question is the 3.5 much faster than the 3.3 the answer is yes. Usually a 3.5 1st gen will beat a 3.3 first gen (both being stock of course) anywhere from .5 to .8 in the 1/4 for a good average. People state anywhere from 16.3 to 16.7 for a stock 3.5. And they state 17.2 to 17.3 or higher for a 3.3.
As you can see I've done the cold air intake, MSD, wires, plugs, and "tuning" hehe. Also I have these but I haven't really told no one till now.
Throttle Body Spacers
I'm sure you have seen these in other catalogs such as summit racing for sure. They have them for a bunch of cars. They act like carb spacers and they help "swirl" basically increase air velocity. Some companies who make them make huge claims like 20 hp and others like 8 hp max. I would say they are worth 5 hp tops on my car since its tons of air in the first place. I haven't finished the intake yet. I have an AEM bypass air valve inline in case i drive through a pond for some dumb reason. I put it on for just peace of mind even though I'm not worried about water getting in it. I haven't done the scoop yet cause I need to get an Xstream K&N filter to set that up.
You CAN do the MSD system on the 3.3 if you want. Heck you can do anything if you work hard enough. Well just thought I post some info on the topic. Others who talk to me often have asked for my advice and usually end up being happy with what I tell them to buy or do. Feel free to IM me if you want or email me.
[ November 09, 2001: Message edited by: 94IntrepidES ]