Any manifold I make has the bore matched to the bore of the carb and gasket being used. I am not familiar with a twister manifold but understand what it does for the throttle linkage. Can you bore the manifold to match the carb?

Thanks for the link and I do understand the buying to sell agenda. I sold someone here two new short blocks for what I paid for them and he relisted them on eBay for a tidy profit. I did send him a nasty gram and he won't do it again via me.