[ds1]

The 600 carbs are cheap to buy. I pay $30 to $40 each for them. The 450,s I bought off Ebay for $225 them milled the chokes off and reshaped the body down inside the carbs. Next I tapped and plugged the transfer tube for fuel ground the rear fuel bowl pulled the plug out and tapped the rear bowl so both carbs had fuel lines running to them. Last I made the fuel block with one 1/2 inch line coming in and 4 3/8 lines coming out. I am using the Holley intake because it is short and I wanted to keep everything under the hood. The Holly intake is not so much a street intake. That is why I am using the big circle track cam. The Weiand intake is good for the street. The package Summit sells works well. Hot Rod or Car Craft did an article on the weiand set up within the last two years and showed they can work well for the street. Personally I like to keep my carbs as small as possible to save on fuel costs. You can also use a pair of Carter Competition carbs. They make a 500 cfm. I use Carters on my street cars that I want a fair mix of performance and economy. Holleys are gas hogs. To answer your choke question. My rear carb has the mechanical choke parts on it for start up I use it for the fast idle only. This makes it easier to get the engine up to temperature without stalling several times. I can say that a tunnel ram is not as hard to work on and use as they look. This car starts easy and works well. The longer runner intakes work better on the street but will stick up through the hood. Do not know if that is a concern or what you are looking for. As far a the 1850-2 that is just a later model with some changes made to the original design. Try to stay with a matched pair. As for cam I agree with Bentley call a cam maker and get their recommendation. So much information goes into picking a cam, they will steer you in the right direction.