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3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM
3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM
3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM
3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM
3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM
3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM
3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM
3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM
3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM
3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM
3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM
3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM

3856208 1965 Big Block Chevy Rectangular Port Heads 396 425HP 375HP Z16 BBC GM

$ 976.27

Availability: 100 in stock
  • Item must be returned within: 30 Days
  • Returns Accepted: Returns Accepted
  • Return shipping will be paid by: Buyer
  • Condition: This is an original pair of GM cylinder heads for Big Block Chevy engines. The casting number on each head is 3856208. These heads have the high performance rectangular intake ports and closed combustion chambers. The 3856208 cylinder head was used exclusively on 1965 L78 396/425HP and 396/375HP(Z16) engines. That's right, these are 1965 only cylinder heads that were only used during the second half of the model year after the 396 engine intro. This is an extremely hard to find pair of 1965 HI PERF heads. These heads were recently purchased at an estate sale. They were bolted on a complete 1970s 454 engine. Since the heads were not original to the engine, I pulled them off. The heads are complete with valves, springs, retainers, studs, and guide plates as shown. I did not clean the heads so you could see the chambers were all burning cleanly by looking at the carbon in the chambers. The intake ports have been smoothed as shown. The exhaust ports look to be as cast. I do see a........
  • Refund will be given as: Money Back
  • Manufacturer Part Number: Chevrolet
  • Restocking Fee: No
  • Interchange Part Number: BBC rectangle square 1967 67 L71 L-71 L78 L-78 SS
  • Brand: Chevrolet

    Description

    This is an original pair of GM cylinder heads for Big Block Chevy engines. The casting number on each head is 3856208. These heads have the high performance rectangular intake ports and closed combustion chambers. The 3856208 cylinder head was used exclusively on 1965 L78 396/425HP and 396/375HP(Z16) engines. That's right, these are 1965 only cylinder heads that were only used during the second half of the model year after the 396 engine intro. This is an extremely hard to find pair of 1965 HI PERF heads.
    These heads were recently purchased at an estate sale. They were bolted on a complete 1970s 454 engine. Since the heads were not original to the engine, I pulled them off. The heads are complete with valves, springs, retainers, studs, and guide plates as shown. I did not clean the heads so you could see the chambers were all burning cleanly by looking at the carbon in the chambers. The intake ports have been smoothed as shown. The exhaust ports look to be as cast. I do see some modifications to these heads that I will outline below. These modifications will not show when installed. First, the exhaust manifold bolt holes have been enlarged to 7/16 threads instead of the factory 3/8 threads. The valve cover sealing rail above the intake ports have been clearanced for a tunnel ram type intake. Finally, someone engraved C.K. on the end of each head as shown. These engravings can be faced towards the rear of the engine so they will not show when installed. These heads have been in storage for a long time and should be rebuilt before use. These heads will look great when installed and I priced them with the modifications in mind. Don't miss these awesome factory 1965 HI PERF heads.
    This is your chance to own the real deal 3856208 heads you have been dreaming about at a GREAT PRICE! Don't Miss Out!
    Check out my other listings for more rare and hard to find parts.
    Shipping:
    The shipping cost shown is for the Continental US. Alaska, Hawaii, and Territories please inquire for a shipping cost.