I would suggest that you carry a valid AP with you. Just in case, the consulate refuses to give you a visa, there will be an option for you to come in and use your EAD. Else you will be stuck in Delhi.
I was kind of in a similar quandry recently when I did not have my H1B visa stamp and also did not have a AP, and had 485 applied. I thought I will get my visa revalidated in Delhi, but a section on Delhi embassy's web-site talking about refusals threw me off - Section 221(g). I posted on this and some other boards and based on experience of many members decided to do visa revalidation in US only. Fortunately at that time visa revalidation was still valid and I had no issues.
H1B is a dual intent visa but visa officers are not very kind towards people who have applied for a immigrant visa but are also applying for a non-immigrant visa stamp. According to them you are a confused individual who does not know what you want and are wasting Uncle Sam's time and resources (after you paying their salary they still think you are doing that .. what an irony) It depends on who interviews you and it is always safe to have AP and EAD with you before you make the leap of faith.