estimates for this combo...
 

ok, for my rs, i was considering the following mods...
slp posi and 3.42 gears
1 3/4 headers(don't know which) , catco cat and slp exhaust
port/polish LB9 heads w/ 1.6 rockers
ultimate tbi, and custom air intake from tpi dual element
chip, dual fan setup, weight reduction (seats, some trim panels, spare tire, rear shade cover

what would i be looking at as for est power or 1/4 times? just wanted to know if this seemed like a decent combo till i can get a built 350 in another 18mos.
other mods in sig
thanks
mike

It is a nice starting point but I didn't see a cam listed in there. You need to get a cam with that combo. I wouldn't use 1 3/4" headers on a 305. Some people do and will tell you its fine but I say stick with 1 5/8". But I am assuming you want to use these on your 350 down the road so I can see why you would want these. If your 350 is mild the 1 5/8" will work fine as well. If you add an LT1/LT4 cam on top of that combo and you get a GOOD custom prom you can probably see anywhere from mid 14's to mid 15's. Your et's will drop if you add some suspension to that combo.