* Tax bill calls for corporate tax cut to 20 pct from 35 pct
* Trump nominates Fed's Powell to lead U.S. central bank
* Facebook declines drag on S&P 500, Nasdaq
* Tesla slumps after Model 3 delays, biggest-ever quarterly loss
* Dow up 0.35 pct, S&P up 0.02 pct, Nasdaq down 0.02 pct (Updates with close of U.S. market)
Nov 2 (Reuters) - The Dow industrials climbed to a record high on Thursday while losses in Facebook kept the S&P 500 and the Nasdaq in check as investors assessed the long-awaited tax cut plan unveiled by U.S. President Donald Trump's fellow Republicans.
The bill called for slashing the corporate tax rate to 20 percent from 35 percent but also ending certain tax breaks for companies and individuals.
While many market watchers have pointed to a corporate tax cut as further fuel for a record-setting run for equities, investors said the bill was just a starting point with significant negotiations likely ahead.
The message from the market is there are still a lot of unknowns out there, said William Delwiche, investment strategist at Baird in Milwaukee. Its kind of hard to draw too many conclusions at this point from what exactly the bill will end up being.
The Dow Jones Industrial Average rose 81.25 points, or 0.35 percent, to 23,516.26, the S&P 500 gained 0.49 points, or 0.02 percent, to 2,579.85 and the Nasdaq Composite dropped 1.59 points, or 0.02 percent, to 6,714.94.
Gains in shares of industrial stalwarts Boeing and 3M and bank Goldman Sachs helped boost the Dow.
The U.S. housing sector tumbled amid concerns over the tax plan's cap on deductions for mortgages.
The PHLX Housing index fell 1.1 percent, with Toll Brothers down 6.1 percent and MDC Holdings off 12.0 percent.
Shares of home improvement retailers also fell. Lowe's dropped 4.1 percent and Home Depot fell 1.6 percent, weighing on the Dow.
Trump officially nominated Federal Reserve Governor Jerome Powell to head the U.S. central bank, a pick that had been widely anticipated.
Powell has supported current Chair Janet Yellen's general direction in setting monetary policy and has been viewed as relatively dovish on interest rates compared to other leading candidates for the post.
I think he was a dovish choice, which probably gave a greater comfort level to investors on Wall Street, although I think his selection had already been baked into the market, said Chuck Carlson, chief executive officer at Horizon Investment Services in Hammond, Indiana.
Third-quarter earnings season was also in focus, with investors citing corporate profit growth as supporting the market's rally in 2017.
With more than three-fourths having reported, S&P 500 companies are expected to have increased profits by 7.7 percent in the third quarter, up from an expectation of 5.9-percent growth at the start of October, according to Thomson Reuters I/B/E/S.
Facebook shares fell 2.0 percent as investors shrugged off strong quarterly results and worried about the social media company's spending. The stock was the biggest drag on the S&P 500 and Nasdaq.
Tesla Inc shares dropped 6.8 percent after the carmaker pushed back its production target for its Model 3 sedan and reported its biggest quarterly loss ever.
Blue Apron shares tumbled 18.6 percent after the meal-kit delivery company reported a bigger quarterly loss than expected.
Declining issues outnumbered advancing ones on the NYSE by a 1.06-to-1 ratio; on Nasdaq, a 1.29-to-1 ratio favored advancers.
About 7.4 billion shares changed hands in U.S. exchanges, well above the 6.2 billion daily average over the last 20 sessions.
(Additional reporting by Sruthi Shankar and Tanya Agrawal in Bengaluru; Editing by Meredith Mazzilli and Nick Zieminski)