1.  A. Gerber.  1925.  "Lists of Swiss Emigrants from the Canton of Basel, 1734-94." Chap. VII, pp. 89-206 in Albert Bernhardt Faust & Gaius Marcus Brumbaugh, eds.  Lists of Swiss Emigrants in the Eighteenth Century to the American Colonies.  National Genealogical Soc., Washington, DC (Broderbund CD-267):

p. 145	AMT MUENCHENSTEIN Benken...
p. 146	Heinrich Spar, 52 years of age. I.I.I.   Permitted to leave gratis. Anna Maria Kapp, his wife, 42 years of age.     Anna Maria, their daughter, bapt. Oct. 20, 1748 Honest and industrious people.

"I.I.I" means the emigrant party consisted of one adult male, one adult female, and one minor child.  It's very odd for a couple in their 40s/50s to have only one (very young) child.  I suspect the daughter, Anna Maria, was not baptised as an infant.

2.  Israel Daniel Rupp.  1876.  A Collection of Upwards of Thirty Thousand Names of German, Swiss, Dutch, French, and Other Immigrants in Pennsylvania from 1727 to 1776...  Philadelphia, PA  (repub. 1931, Leipzig; repub. 1965ff by Genealogical Publ. Co., Baltimore, MD; in 2000 as Broderbund CD-267):

p. 190	Aug. 30, 1749. Foreigners imported in the ship Crown, Michael James, Master, from Rotterdam, last from Cowes.--In all 500 persons...
p. 191	Henrich Spahr...

3.  LDS.  Family Search: Internet Genealogy Service:  IGI - International Genealogical Index (online at FamilySearch.org).

Hans Heinrich SPARR Christening: 23 Jun 1695, Benken, Basel, Switzerland Father: Hans Joerg Sparr; Mother: Margreth SPARR Source: patron submission

Hans Heinrich SPARR Birth: 01 Sep 1696, Benken, Basel, Switzerland Father: Hans Jorg SPARR; Mother: Margreth HEYER Source: patron submission

Heinrich can't have been baptized before he was born, so one or both of these dates is wrong.

4.  LDS.  Family Search: Internet Genealogy Service: Pedigree Resource File (index to CDs, online at FamilySearch.org).  One of the submitted files says our subject emigrated in 1749, the same year as his brother, Hans Ulrich SPARR.

5.  WorldConnect / Ancestry World Trees (online at RootsWeb.com/Ancestry.com).