here's a question, and it might already be on another thread, i have a chance to buy a 84 or 85 bluebird trx , i have a 78 120y 4 door sedan manual, i want to use it as a daily driver mostly, is the l20b an easy conversion or will it need alterations to the firewall and tunnel, do i really need to transfer the skyline struts it has or is that not absolutely necessary? is the borg warner diff strong enough to handle this conversion or do i really need to alter the rear diff and axle?, i just want the bigger motor... can it be done? and if it has been done by someone, how much did it cost, the car is a few hundred bucks with all good parts, .........