I purchased a Mustang II front suspension stub from Fat Man (https://www.fatmanfab.com/mustang-ii-mii-stub-suspensions). They have them built specifically to fit the Lark/Avanti frame. Others make similar but not sure if they are specific for Lark/Avanti. Also, not sure you can do this with the body on the frame as a lot of cutting and welding is required. See Photos, wish I could make them smaller but not s
I built a jig to ensure alignment and placement of the engine mounts before any cutting. After the new stub was welded in place, had the whole frame powder coated and then installed the suspension and steering rack. I also had to use new connectors on the steering column as old ones did not align with the new steering box. You can get parts for this from Flaming River (https://www.flamingriver.com)
Also important to note that this change will significantly lower the front end of the car, providing a significant rake. If you don't like that you might ask Fat Man how to prevent. The custom cowl induction hood did provide adiitonal and necessary clearance for the R3 airbox and hopefully will provide for more air flow through the engine bay.