[SOLD] Mopar Performance 576 Heads

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couper 340

couper 340

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Selling a set of M.P 4772576 Heads that have 25 1/4 mile passes on them and about 200 street mile to the track and back . Just took them off the car as i am going back to stock so i can used this car more . They have 2.02 / 1.60 Milodon valves , Hughes 1129 double valve springs and retainers and keepers . seat 145psi @ 1.800 and 3.58 @1.250 was running a cam with 575 lift with 1.6 rockers were set up to go to 600. They are 64cc chambers and large push rod holes
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. they were fitted with the 2.02 and mild bowel and very lite port blending . These were new bear heads . These heads never came on a car they are w2 style exhaust ports and flow much better than j and x heads , they replaced the 308 heads. just need to clean the gasket surface and bolt them up . some oil carbon from my low tension piston ring in chamber not from the heads. $1,000.00 plus shipping wich i wood guess to be about $100 to ship the pair Fed X.
 
I Would have to go back and find the article , but it was saying that the port was w2 style do to the floor and roof of the port not the exit shape, but i could be wrong as i am old .
 
I remember these being sold as a "swirl port" head compared to the 308 heads. I have a set on my car. They stopped making them around the time the edelbrocks came out.
I never heard them compared to the W2.
 
These are essentially 308s without the smog pump provisions. A few were apparently sold with T/A pushrod hole placement. The exhaust short and long turn radius were inspired by/more similar to W2 than other LA heads but not W2 ports by a long shot. The designer had other improvements in the prototype 308 heads but only the exhaust side made it into production. The "swirl port" is actually a happy side effect of the pushrod pinch required for the huge pushrod holes for the factory roller cam blocks. Good heads, with some good valvetrain parts added by seller.
 
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