You've got to pull the motor, you have a rod bearing that was squeezed pretty damn hard & is probably ruined, the rod journal needs inspection, and the connecting rod could be bent. Your piston may also be damaged beyond the point where it is safe to continue using it.
It is easier to pull the heads once the motor is removed, so why torture yourself, pull the motor.
Both heads MUST come off & the valves, retainers & keepers replaced, or else this may happen again.
Your friend on the DTBB, George
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.