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Thread: BOSS 302/ 351C 4BBL High Performance Heads

  1. #11
    89mustang08 Guest

    Re: BOSS 302/ 351C 4BBL High Performance Heads

    ya this stuff is not mine i am doing this for a friend that just has this stuff laying around the shop came off a 86 mustang gt 350 but i will try to answer any questions that ya'll give out

  2. #12
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    Re: BOSS 302/ 351C 4BBL High Performance Heads

    Quote Originally Posted by 89mustang08
    the casting numbers are 1E26 then another number 19753
    should be a number like D1AE

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    Re: BOSS 302/ 351C 4BBL High Performance Heads

    The best way to tell is by CC or casting #'s. To be used on a 302/351W the 2v works best or a set of Aussi 351c which have the large runners and small cc. The block/heads will need to have water passages modified to match up and a new intake, Boss 302 or Clevor intake will be needed. Honestly I have looked into doing this for quite a while and there is little to gain except for the wow factor. Cost per cost, pound per pound, a nice set of aftermarket heads work better. But I personally like the WOW factor. TTT for ya.

    1967 Mustang: Roller 302
    Car built by me and my son
    TRW forged pistons, Girdle, TFS stage 2 cam, RPM intake, AFR 185 heads, Sharp 1.6 RR, ARP all the way, DaVinci Holley 625, Carter electric fuel pump, Hooker LT headers, Malory Unilite dizzy, Crane HI6, Tremec TKO, SPEC stage 3 clutch, Griffin radiator, underdrive pulleys, high torque mini starter

    Hater of twice recycled douchecanoes discarded on the bathroom floor.

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    Re: BOSS 302/ 351C 4BBL High Performance Heads

    Those are 1971 351 4v (old school - carb is 4 barrell) closed chamber heads.
    Note the "4" cast on the upper corner of the head, that indicated 4V heads.
    They are D1AE - you can see it on the bottom of the port runner in the pics.
    The 1E26 is the casting date, 1971 May 26
    They have screw in studs and guideplates
    I have a couple of Mach 1's, a 1973 351C 2V and a 1973 351CJ 4V

    The CJ had similar heads, but open chamber and no screw in studs.
    I also agree with redrocker67, they are worth $200 - $300 depending what
    valves and spring hardware is in them.

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    Re: BOSS 302/ 351C 4BBL High Performance Heads

    you sure about the screw in studs?
    i didn't see any hex nut on them

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    Re: BOSS 302/ 351C 4BBL High Performance Heads

    Ya' know, Joesgt281, you might be right.
    The rocker pedestals look to have been machined down, because the factory ones
    are taller than what's on those heads. They may be screw in with some
    guideplates that I don't recognize with the nylon pockets for the pushrods.
    Usually you see the crane or manley guideplates with the open slot for
    the hardened pushrods.

    RacerX

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    Re: BOSS 302/ 351C 4BBL High Performance Heads

    So what kind of power can those heads handle?? Are they good for say a 331 with a good cam in it?Cam meaning TFS 2 cam....

    Dart 347 N/A for the show and NOS for the go!!
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    Re: BOSS 302/ 351C 4BBL High Performance Heads

    Quote Originally Posted by foxnut1
    So what kind of power can those heads handle?? Are they good for say a 331 with a good cam in it?Cam meaning TFS 2 cam....
    they'd be great but you'll need the new Edelbrock manifold or one of the old B&A intakes to use those heads on your 302 block.

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    Re: BOSS 302/ 351C 4BBL High Performance Heads

    You would need quite a bit of compression and camshaft to handle those heads on a smaller cubic inch engine. The stock 4V heads actually feed perfectly at 400". I have used them on a 340" setup and it took more compression and camshaft than you'd like to have on the street. For a street setup you could easily go 427" and still have plenty of airflow. The last 393" I built with 4V Cleveland heads made 688 hp with one four barrel and a decent sized roller cam.

    Those pictures show the pushrod conversion setup for pressed in rocker studs. They are definitely NOT screw in studs. I would also be reluctant to use them with the spring pressure required for that camshaft.

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    Re: BOSS 302/ 351C 4BBL High Performance Heads

    have a set of those heads that I had on a 302 yrs ago and a Roush Intake and N20....Runn'n 10's....

    I've got $1,800 in mine but will only fit a windsor motor now...They are considered a Yates Style Head....

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