Anyone have any experience with these? I am looking at an Alumacraft 1860 tunnel. They offer all three with this package....of course the more HP the higher the price. They say the 60 will push it in the low 30s, 70 in mid 30s and 90 in high 30s. With a load the 90 will get a better hole shot. The boat is a MV...18' with 60 bottom.<br />Also, it comes with a 12g fuel tank...any concerns? A 60hp fourstroke is available too.<br /><br />Thanks,<br />Wily