Tubular subframe with "LS" motor, Miata mounting dimensions

Preliminary setup using 4.8 truck motor

LS motor mount driver's side

Steering clearance at header

Pasenger side header.

You can barely see the motor mount offset as compared to the driver's side.

These pics show the motor mount plates that were later swapped for energy suspension 3-1148G 

The following are some pics of the firewall mods required to slide the motor back far enough to clear the sway bar and steering rack using the F-body pan.

 F-body pan and front dress

Reference pages with critical dimensions from the Miata Workshop manual, 1993 edition. Should be the same for all NA's and many dimensions will be the same for NB's.