easy Most SRs engine swaps come with everything you need to put the swap in. The wiring harness / turbo / ECU / Trans / igniter chip / starter / alternator / etc
the motor mounts spots are the same.
you have only three wires that you have to tap into to connect the engine harness to your main body harness (and most importantly) connect to your dash (RPM/speed/fluid temp)
That is the basics and the more i think about it i can get back to you
I have built mine and done all the work myself
The basic swap will be good for 205-250 hp crank (depending on motor)
with intercooler / boost controller / fuel pump we can add 50 HP easy
the parts list that is done to my car (engine wise)
SR20DET (Redtop)
Apexi GTspec full catback
Greddy R-spec FMIC
HKS SSQV BOV
Greddy Hotpipe
Greddy Downpipe
Greddy rocker arm stopper
Exedy Hyper Single Clutch/Flywheel
B&M Short Shifter
Koyo radiator
Signal Auto Oil Catch Can
AEM Standalone
Greddy Oil Pan
Brian Crower Cams Stage II
Manley Rods
ARP Head studs / Main Studs
Cosworth Head Gasket
OEM Main Bearings / Thrust bearings
ACL Rod Bearings
Samco Rad Hoses
Wrinkle Black Valve Cover
Supertech Dual Valve Springs / retainers
ARC Spark Plug Cover
Mahle Pistons (.02 oversized)
Modified Oil Squirters (to go with pistons)
HKS 550 CC Injectors
AEM AFR and Oil Presure Gauges
GT 2871R .64 A/R
Greddy Pulley Kit
HKS air flter on Mac Autosport Air Intake
TUNED BY MAC AUTOSPORT (360 RWHP and 320 ft/lbs)
Injectors running 90% duty cycle
pushing 23 lbs of boost
NEED BIGGER INJECTORS
This is most of it,