I have used a Clifford single 4 BBL since 2001 on my 270. I got it at a time when I was told they were developing a new design and were having their casting done by whoever was casting the Offenhauser parts. It is rough, It has big ports, no name, and it took a bit of fitting. I did not get the new design, a logo, or a discount. Clifford is out for me and has been/will be. I would spend the time and $$ to find a better setup for your 270. Sadly I don't know how many 4 BBL options you have.
