small block vs. big block in a cobra

[diegokid]

I went through the very era of doing more with less, it failed. Apples to Apples if you start with more you can end up with more.

[Fred Z]

you know........it really is an overdone issue! I am not an expert, but having had 2 Cobras with 351's ...the most recent is CHP motor......stroked to the all important...427...puts out 550 hp and 550 torq. Now, I have been around the big's and heard and taken off with them.......quite a few actually.....and no advantage either way....even the sound is similiar.....very similiar....but hey, you need to do the research and decide..
I do, and have, always found that those that HAVE are excited bout that and will brag it up, which is a good thing. BB boys like BB....and SB boyss like their SB's. Advanges of both....not so sure the BB's are all that much more powerful as some say....even the motor builders will tell you so. But, in the final analysis.....they all are fun. I will admit..though, when I see a hood open and a BB there....is pretty cool!! But, when I show mine.....haven't had ANYONE who is looking....go...oh, what a shame!.........with the slight exception of a BB guy!! (had to say it to you BB boys, sorry, just messin)
One last thing......Boyd....and trust me on this, and most will agree, regardless........when you have big hp and torq...and hit the go pedal....won't matter if you have a yugo motor......it blows your hat off, scares the shi$ out of you and others...and your girlfriend has just taken her.......last ride with you!!!!!!!!
have fun.......stay safe..........and go flying.
fred z

[MKS427]

Carroll Shelby originally wanted the aluminum 390 FE for the S/C. NASCAR would not give them up. That said, he was probably looking for to keep the car balanced and get as much power as possible.
If your Classic Roadster has a 96 inch, wheelbase it would throw off the weight bias relative to a 90 inch wheelbase car. In which case you might want to consider a lighter power plant, if you desire better handling.
I was considering a big block, but only if I could get a hold of one of the aluminum Ford blocks that are no longer in production. I ended up going with an iron Dart block stroked to 427. I built it to have better low-end torque numbers versus high-end horsepower. I am very happy with it.
Whatever you decide I am sure you will enjoy. Probably the best recommendation, is just to make sure it will be reliable on pump gas.