Ok, my 250 has the stock Rochester Type B 1 barrel carburetor. (Just in case you've never seen one.)
[img]
http://i27.photobucket.com/albums/c157/DiscoDanny/Truck/Roch1bbl.jpg[/img]
I have found what I believe to be all the parts necessary to complete this conversion. The adapter was only 15 bucks off of TD performance and this particular one fits
most 2 barrel carburetors. The diagram showed that a Rochester 2 barrel would, so that one I chose to pursue. The original 1 bbl has 2 studs (as the base of the adapter has 2 holes) and a 2bbl rochester has 4 holes (and the adapter top has 4 holes as well as a rectangle setting). As for the holes that the fuel actually travels through, the large 2bbl oval tapers into the 1 barrel circle.
[img]
http://static.summitracing.com/global/images/prod/large/trd-2025_w.jpg[/img]
Before assuming that a used Rochester 2bbl would fit right on, I happened along a
spacer that was hiding under the hood of an ElCamino along with a fairly complete Rochester 2bbl.
[img]
http://s27.photobucket.com/albums/c157/DiscoDanny/Truck/th_2bblspacer.jpg[/img]
Unfortunately my adapter won't be here until tomorrow. However, once comparing the spacer v.s. the adapter, I will know. I believe that it will work, I'm pretty confident of it. Instead of blowing 2oo bucks on a new one, I'm just gonna rebuild that ElCamino one and end up spending 50 bucks. If this setup works really good, I'll probably invest in a professionally rebuilt one (or new if available). Here's what a Rochester 2bbl looks like...
[img]
http://www.partsamerica.com/product_images/AAP/CHR/3-735.jpg[/img]
I will update on Thursday (possibly late Wednesday) with the results.
