Need thoughts/advice on motor options please

[jsaig1]

Hello,

I have wanted a cobra for over 20 years, and am finally ready to pull the trigger when I find one. I would appreciate some advice on motor options. I am looking to buy a used Superformance MKIII, but not sure on which engine options might be best suited for my use.

I live in Los Angeles and would likely drive it a few times per week, around town and drives through the canyons. Considering the heat here in the summer, I want to make the best choice for drivability and reliability. I have some mechanical skills, but am no expert.

I have been leaning towards finding one with a Roush 427 SR or R, but am finding a few with 460 Cobra Jet motors. Any input on the driving characteristics? I know big blocks are heavier, but since I am not tracking it, does it matter much for my intended use? Other motors to consider? Any easier or harder to keep tuned?

Thanks in advance for any replies.