Many of you have helped with my short lived 4-53 blower on a Y block project, Thanks. I have found out that a 4-53 is too small for for a 292, would be better for a 239 flathead but too small for me. (Anyone want to buy a 4-53 cheap?) It is the larger one of the two. This brings us to my new project, a 4-71 blower on a Y block. Before I get too far into this, what are the pros and cons? Price, I can make most of the parts I will need and a Hamber is getting me a good deal on some stuff. Performance, well, I guess that will be a plus. Dependability, any thought on this? Will affect the idle quality? I have an automatic. What about some thoughts on how to set it up, What size carb should I run? would like to use a 4150 Holley. How about the power valve? I guess that works the same. What about my vacuum advance? can I still use it? Anything else I should consider for a street 292 Y block in a Model A?