So you you are puttin an LS motor in your FC3S, and you got some of your parts already? I can still be your huckleberry. These are the motor mounts that bolt to the FC rx7 subframe. On the motor side you will need Ronin or C5 motor mount stands, and biscuit isolators to complete the conversion. These parts will come powdercoated at this price.
Price shown includes 2 assymetric chassis adapter mounts and hardware