Looking at some YB posts it seems some programs pick up well with the SV1 and others can't get it to work at all. Can you guys post some info on your combos and if you had any problems before getting it to work? I talked to Patrick a while back about an Indy SB engine which was not done and was est the HP would be in the 650 to 675 range and he tried to steer me into a 4150 carb. The reason why I was interested is that the Indy intake is only set up for 4150. In order to run a Domy you have to run an 4150 to 4500 adapter or spent $600 or more getting the manifold modded. The SV1 will out flow a Domy using a 4150 base.