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4V heads
#1
Hello everyone,

I still don't know what block I have on my car. Originally, my car came with a 351 4V engine. But who knows what happend after 40 years, I have absolutly nothing about the historic, and this is missing me a lot, more than my ex girlfriend.
What I know is the heads now, are 2V's. The block number is D2AE-CA which can be 2 or 4 bolt on, block can be H or CJ?
What I can do is to remove the oil pan and check.
My question is:
Is it possible to mount 4V heads on engine that came with 2 V's heads?
H code engines were all 2 V's?

Thanks.
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#2
Yes they will bolt right on.... I believe that all h code engines were 2v headed engines. The q codes were cobra jets with 4v heads from the factory. I own a h code, my block was stamped with D2AE CA, it was a 2 bolt though.

THE HOOFBEAT IS LOUDER THAN THE HEARTBEAT!!!!!
SINCE 1964


  Reply
#3
Hi Manu,

Yes 4v heads can be installed on any Cleveland block (any windsor block for that matter). To do the swap you need compatible intake and exhaust manifolds. As for 2 or 4 bolt mains... it won't make a difference. 4 bolt blocks are just more expensive, a decently prepared 2 bolt block is every bit as durable as a 4 bolt block, the outboard 3/8" bolts do very little to stabilize the caps or prevent them from "walking" under extreme conditions. For extreme duty it is more important to find a block with a high nickel content than 4 bolt mains. The race engines in the cars I crew on use 2 bolt blocks and produce over 700 horsepower.

Yes all H codes are 2v engines.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

[Image: 1_12_09_14_10_15_11.png]
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#4
I don't want absolutly or necesseraly set some 4V's, but, first, I'm curious about the power with those heads, and then the car would be closer as original.
I think next year (very soonSmile) I will probably open the engine completly and rebuilt it. Why? Not because comsumption of oil, lack of power, or anything else, just because by pleasure, and after I know what I have under the hood.
But also I don't use additive, and use 98 octane unleaded, I'm curious about the valve seats state.
Timing chain and crank and sproket also need to be checked.
  Reply
#5
But if I want to put some 4 V's head I can.
Champagne is coming, I have to go...
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