Bhullar's previous best was 88th achieved towards the end of last year.
Jeev Milkha Singh, who once ranked in the top-30, is the second best Indian at 104th place. In March 2009, Jeev was ranked 28th, the best-ever by an Indian. He was in the top-50 for a total of 68 weeks between late 2006 and early 2009.
Anirban Lahiri is ranked 158th and Shiv Kapur is at 204th.
Bhullar, a four-time Asian Tour winner, is now on top of the Asian Tour Order of Merit where he leads with earnings of USD 262,648.
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The 24-year-old will continue his rivalry with Aiken at the USD 2.75 million Maybank Malaysian Open which gets underway on Thursday.
Bhullar is confident he can carry his momentum into the Maybank Malaysian Open, which is co-sanctioned with the European Tour, and extend his lead on the Order of Merit.
"I have a strong feeling that with my current form, another tournament win is just around the corner," said the Indian, who earned 12 Official World Golf Ranking points and moved up to 85th in the world.