Looking for a new rad for the 5 but what do people think the best rad is to use ally, copper core, standard etc...? Will be running a separate oil cooler so dosnt need the built in cooler in the rad dosnt even need to be a r5 rad as a volvo engine is going in so if anyone knows of any nice big rads that fit well please let me know! What's the biggest rad you can get in these cars without causing probs?