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it has a square bore carb flange instead of a spread bore
Increase fuel volume and better fuel distribution with these Speedmaster fuel rails
straight ball-milled
the Speedmaster piston oil ring spacers will keep your pistons working smoothly throughout the entire operating range
our Top-End engine kits will save you the time and hassle of mixing and matching components yourself
Chevy 400 1955-79 Full Gasket Set w/MLS Head Gaskets it has a square boreThese Speedmaster gasket kit sets include premium quality head gaskets, intake gaskets, exhaust gaskets, valve cover gaskets, oil pan gaskets, valve stem seals, and all accessory gaskets everything for a complete engine rebuild. If it has to seal right the first time Speedmaster has what you need. Complete kit with Multi Layer Steel (MLS) Head Gaskets.
