Dominic:
Stroking to 427 was orginally my goal also.
But researching it I found that the answer lies in what you intend to do with engine. The 427 is fine IF, you want a street/rod type motor with tire smoking torque only. Reliablity, life and
oil usage will be higher because of the
oil ring, pin issue.
If you want to do track events and run sustained higher rpm it's a poor combination. The rod ratio are poor and piston speeds are nearing the safe limit at about 6000 rpm. This combo is a torquer and is better suited for a 3500 lb Tang. Cobra are so light, they dont need extra torque. For all around performance we want to trade some torque for Hp and go with combination that breaths better and turns up with out exceeding the critical piston speed issue.
gn