Originally Posted by segapet
hope you can help!! I have a 68 ZB custom 221, I have now a 250 2v head to go on what type of carby should I go for?? It is an every day driver and Im thinking a 350 holley may use a lot of juice, what about a webber from an XD to Xf????
Hi, The 2V head will work ok on the 221 but will drop the comp ratio due to its larger chamber. This will still be ok as it will run nice on ULP. The exhaust valve seats are prone to ressesion from unleaded fuels so i recommend you have hardened exhaust seats fitted as a minimum.
If you have the origional Stromberg WW2 carby it will work fine for a stock/mild daily driver. But a weber from an XE/XF would be an ideal choice on this setup due to its staged primary and secondary barrels it will give great driveability, economy and power.
The 350 is too big for the 221 ci engine, it would make good power at higher rpm but you will never get the low end driveability/economy as nice as the WW2 or thr weber.
Stick with the stock carb or the Weber and you will not regret it.
Just take note of the center exhaust port on the 2V head, it has a lower gasket line at the top of it and some extractors/manifolds will not seal it at this spot.