Best bet would be a 164S swap - that would get you in the power range you're looking for right off the bat (I would retain the motronic). 164's can be had very cheap, (except 24v QV). You'll be wise to perform an overhaul of whatever you source. The 3.0 Verde swap is probably the most common swap and is a direct install. You won't reach your numbers though without further modifications. It's very difficult to take a small displacement motor (< 3.0), make that kind of power
and pass smog tango1.
One has to be realistic about the kind of money you want to spend and the amount of time you have to iron everything out. -Just look at all the projects going on with power hungry alfisti. They, without exception, take bookoo time and effort and
rarely get cost effective results.
If you just want extra power sometimes (like, when eyballed by a ricer at the traffic light)

get yourself a 50-shot of nitros (make sure you use a fogger style nozzle) - you can do this for < $500.00.
NOS Sniper Universal EFI Wet Kit - JEGS
I'd say keep that low mileage beauty 2.5, up the compression (10.5-11.5:1) by either going forged pistons or (less $$) having the heads milled. Get yourself a pair of Milano Verde cams
(reasonable as opposed to "S" cams - hell, you might be able to get someone to give 'em to you!) and lastly, get a Split-Second MAF conversion kit. IMO this is better than going full-blown aftermarket EMS for those with limited skills, time, & money.
Split Second - this system opens up the intake by replacing the AFM, and piggy-backs the stock ECU (actually, intercepts) and adds programmability (PSC1). You might consider a Saab RRFPR as well
NEW Rising Rate Non Turbo FPR. Or, get a set of bigger injectors - Bosch 0280150151/152
Bosch Injectors - Alpha Romeo, Fiat & Jaguar Fuel Injectors
If you have any money left over, get your plenum polished, Extrude-honed, or teflon coated.
Note: The PSC-1 is offered in different models so you'll have to order the right one. Reason being is the fuel pump switch and air temp sensor in the stock AFM have to be accounted for.
Coil packs are nice, but engines have been running fine on single coil technology for 90 out of the 99 years of automobile history, so IMO a waste of money tango1.