PARTS : RADIATOR, RADIATOR SUPPORT, SUBFRAME, RACK AND PINION.

I was wondering if I can use these parts from an sc400 and and replace it into my sc300.

 

Yep, all of those items listed above can be swapped from 400's to 300's.

EDIT: Apparently the Radiator is different!

 

I dont think the radiator will be the same.......not 100% on that but im pretty sure

 

Radiator is a little different. I would assume the hoses are too. If u r pulling it off of another car do yourself a favor and spend the money for a new one. I recently learned this the hard way. The other parts should be fine though

 

the 300 and 400 use different radiators.

 

my bad I thought they were the same. Please ignore my dumb info about the radiator OP.

 

Anything to do with engine and drivetrain parts are going to be different from the 300 to 400.