redsnapper386
Regular Contributor
guy's, i have a 1987 5.7 260 h.p. 350 with a 4-bbl quad with a low rise stock intake. my question is how much h.p. would i gain by going to a high rise intake,and tuned headers.is there a majic# to go by.thanks.
MarineEngine.com does not offer troubleshooting assistance or repair advice by email or by telephone.
You are invited to join our public Boat Repair Forum to seek assistance from other members.
You may also visit the Boat Motor Manuals section of our site to obtain a service manual.
Your money would be better spent on a set of Vortec heads. This would require an intake change as well, but a lot of bang for the buck.