"spread exhaust port" heads for pre 92

[johndezman]

has anyone any experience with heads that have the "spread" exhaust port (versus the standard siamese type)? power or reliability benefits? any long tube headers available for the c4?

[gkull]

Spread port heads are generally made for all out CFM flow. I opted against them because of two reasons. One being the $1000's for custom type headers in the 1 7/8th to 2 inch primary range. My other concern was raised port intakes with 230+ cc port volumes. I didn't think that my little 383 ci could swallow all that.

Now if your building a 415+ ci SBC with a solid rollers and intend on hitting 7000+ rpm an a regular basis I'd say go for it! :)

I'd check with Stahl headers


[Modified by gkull, 4:55 PM 11/4/2002]