Go to
http://www.webercarbsdirect.com and they will have a kit that includes adaptor plates for your manifold. I would call them to make sure you get the right adaptor kit. Go with the 32/36 and see how it runs- you may not need to re-jet. If you have a manual choke I think it's the DGV model. With electric choke, it's the DGEV model. Do not get a DFV or anything like that, as it is set up backwards. There are a lot of instructions for installing it on this site. Pretty easy and sure gets rid of a lot of ugly smog crap on your engine. Mine passed emissions in Oregon no problem. I would buy it new, because at $230 or whatever it is, it's worth it. You don't have to rebuild it or order the adaptor kit seperately. It also comes with the plate for blanking off the EGR valve port and all the hardware. I just paid $80 for just the adaptor plates and hardware for my 2.3L motor, so it's worth it to buy the package deal.