Go with the 4.25 stroke with Chevy rods. I think 440 Source uses 7.100 long rods and an Icon piston. You can get slightly better parts if you use a SCAT stroker kit with Mahle pistons.

For a street engine I'd stay away from the external oiling. External oiling is just a constant source of frustration on a street car. You don't even need the 1/2 inch NPT internal oiling on a street car but it might be a good idea on a race engine.

TF 240 heads are good and if you get the correct HR cam then you'll be golden. EFI is a very good choice. Either FAST or the Holley Sniper if you're going throttle body.