These heads a a great HP adder for that 306 Allen. I would recommend a TFS stage 1 cam and Street Burner intake, These will handle a 70MM throttle body and a free flowing exhaust.
Answered by BRYAN M. from TROY | 1 Comments 0 0
I have a 1989 convertible Mustang that I am currently building a 331 stroker engine for. The stroker kit is using flat top pistons. I want to run AFR heads. Are these a good choice, or should I use a 165? I am using a GT40 upper and lower intake. I do not have a cam, are there any reccomendations?
Asked by Brandon P. from Luray | Comment 1 0
Honestly that intake would choke down that motor considerably. They barely kept up to 302 cubic inches. Depending on what kind of HP you are looking for, the TFS top end kit is a easy 375 HP on a 331 with good compression.
Answered by BRYAN M. from TROY | Comment 0 0
These heads will flow substantially more air that the ported intake manifold will efficiently flow. It will function but you will be choking down your performance possibilities. It would be highly recommended to get a better flowing aftermarket intake for your set up.
Answered by Scott G. from hewitt | Comment 0 0
It will depend on what other components you will be running with these heads. They should work with no problem but if you are running a large cam or higher ratio roller rockers you might have issues. You always want to check your piston to valve clearance before you start your motor any time you do any head or valvetrain work.
Answered by Nathan A. from Waco | Comment 1 0
Ford Mustang - 1979 (79) - 1980 (80) - 1981 (81) - 1982 (82) - 1983 (83) - 1984 (84) - 1985 (85) - 1986 (86) - 1987 (87) - 1988 (88) - 1989 (89) - 1990 (90) - 1991 (91) - 1992 (92) - 1993 (93) - 1994 (94) - 1995 (95)