CREATE TABLE table_1521 ("Engine" TEXT, "Exhaust Ports" TEXT, "Bypass Ports" FLOAT, "Bypass Boosters" TEXT, "SPI" TEXT, "Tapered Grind" TEXT, "Number on cyl." TEXT)

Is there a tapered grind on the Surestart engine?
SELECT "Tapered Grind" FROM table_1521 WHERE "Engine" = 'SureStart'
SELECT "Tapered Grind" FROM "table_1521" WHERE "Engine" = 'SureStart'