Unit Q77-91 / Uncategorized / By mark 3G very popular on 4.6L and 5.4L trucks. Notice 2 holes inside of webs indicates 130 amp version. Usually 8 groove pulley. $99.00 $30.00 core A=114,174n,88g,135g Z=114, 191n,89g, 148g O=114r, 174n, 88g, 135g (4-15) Your Name (required) Telephone number (required) For Unit Q77-91 Your Message [anr_nocaptcha g-recaptcha-response] Δ