Is the re-coil the same on the ATC70 as the ATC90? Other parts intherchange?

[200XMichigan]

How much of the ATC90 engine can be used on an ATC70 engine? Someone has an ATC70 for sale but its missing the re-coil and some other pieces. But I have two ATC90 engines and no ATC90.

[atc350xer]

Recoil is smaller, and nothing else changes over, but you can stuff the whole 90 motor into a 70, just need to spread the frame apart 3/16" and drill a lower hole on the frame for the motor... and use the 90 chain I believe