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Post  590KA December 1st 2020, 4:50 pm

Thought Id post some of these as Im probably the only one I know of that has done anything with this platform. Ive been running the cylinder head on a 250ci four cylinder in Comp eliminator and Im now building the first 500 that I know of and I have a lot of knowledge on this engine combo. Hopefully youll enjoy the pics. Comment away! Im new to posting here and dont have a clue if my pics will even post or not.

Ford JC51 Img_0110
Ford JC51 Img_4010
[url=https://servimg.com/view/20286276/9]Ford JC51 Img_4112
Ford JC51 Img_4113Ford JC51 Img_0111

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Post  stanger68 December 6th 2020, 3:30 pm

Is that a motorsport head?

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Post  kpascoe December 9th 2020, 10:49 am

Clint,

So that's what your secret project is. It looks awesome. Guess that's what you needed all those crankshafts for. You building a B/A ?
I got my A/R Boss Hemi running. Waiting on a clutch.
Are you going to make it to Gateway for the big comp shootout in the spring?

Kent

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Post  Colt Macara December 9th 2020, 1:13 pm

kpascoe wrote:Clint,

So that's what your secret project is. It looks awesome. Guess that's what you needed all those crankshafts for. You building a B/A ?
I got my A/R Boss Hemi running. Waiting on a clutch.
Are you going to make it to Gateway for the big comp shootout in the spring?

Kent

What date / time @ Gateway? You need track time? Take 2 weeks too tune that baby! Razz
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Post  590KA December 9th 2020, 1:48 pm

stanger68 wrote:Is that a motorsport head?

I guess you could say motorsport head. Its one of 3 heads legal for Ford oro stock

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Post  590KA December 9th 2020, 1:49 pm

kpascoe wrote:Clint,

So that's what your secret project is. It looks awesome. Guess that's what you needed all those crankshafts for. You building a B/A ?
I got my A/R Boss Hemi running. Waiting on a clutch.
Are you going to make it to Gateway for the big comp shootout in the spring?

Kent

Yes sir that's it! I'm planning on gateway but with the altered. This will be an AED deal but probably not done til spring

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Post  gt350hr December 9th 2020, 2:11 pm

Jim Cunningham (rip) won the lottery twice and loved Fords. He worked with Ford and had this stuff made. Larry Morgan had the fastest engines I know of but the Mustang body held back the performance. Larry put one in his ( then ) Camaro ( carburetted days) and ran under the Pro Stock record. When Jim died the parts and development was bought IIRC by Westbrook racing engines well known for building Super Stock hemis. Tremendous power potential.

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Post  kpascoe December 9th 2020, 2:58 pm

gt350hr wrote:   Jim Cunningham (rip) won the lottery twice and loved Fords. He worked with Ford and had this stuff made. Larry Morgan had the fastest engines I know of but the Mustang body held back the performance. Larry put one in his ( then ) Camaro ( carburetted days)  and ran under the Pro Stock record. When Jim died the parts and development was bought IIRC by Westbrook racing engines well known for building Super Stock hemis. Tremendous power potential.

He didn't buy "all" of the parts. I actually own Jim's old clutch resurfacing machine .

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Post  68formalGT December 9th 2020, 4:22 pm

How many of those heads were cast and is there many of them still out there? They look like a damn good head.
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Post  590KA December 9th 2020, 4:28 pm

68formalGT wrote:How many of those heads were cast and is there many of them still out there? They look like a damn good head.

Man Im really not sure. I have 8 raw castings and one more block left. Not much was made by what Ive found out.

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Post  590KA December 9th 2020, 4:31 pm

gt350hr wrote:   Jim Cunningham (rip) won the lottery twice and loved Fords. He worked with Ford and had this stuff made. Larry Morgan had the fastest engines I know of but the Mustang body held back the performance. Larry put one in his ( then ) Camaro ( carburetted days)  and ran under the Pro Stock record. When Jim died the parts and development was bought IIRC by Westbrook racing engines well known for building Super Stock hemis. Tremendous power potential.

Larry Definitely had the best Ford Hemi JC50s but too my knowledge Larry nor Cunningham ever built one of these the JC51. RIP Jim he was a wonderful man!

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Post  68formalGT December 9th 2020, 4:38 pm

590KA wrote:
68formalGT wrote:How many of those heads were cast and is there many of them still out there? They look like a damn good head.

Man Im really not sure. I have 8 raw castings and one more block left. Not much was made by what Ive found out.

Is there a Ford wedge head out there that compares to it, port height, valve angles, etc?
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Post  590KA December 9th 2020, 4:52 pm

[quote="68formalGT"]
590KA wrote:
68formalGT wrote:How many of those heads were cast and is there many of them still out there? They look like a damn good head.

Man Im really not sure. I have 8 raw castings and one more block left. Not much was made by what Ive found out.

Is there a Ford wedge head out there that compares to it, port height, valve angles, etc?[/quote

You would have to compare it to the DRCE stuff but even then I think its even much better. Plus its More GM design cause number one bank is drivers side forward.

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Post  68formalGT December 9th 2020, 6:00 pm

590KA wrote:You would have to compare it to the DRCE stuff but even then I think its even much better. Plus its More GM design cause number one bank is drivers side forward.
[/quote]

Like the RCV head? Do you have to move the lifter bores too?
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Post  590KA December 9th 2020, 6:03 pm

68formalGT wrote:
590KA wrote:You would have to compare it to the DRCE stuff but even then I think its even much better. Plus its More GM design cause number one bank is drivers side forward.

Like the RCV head? Do you have to move the lifter bores too?[/quote]

No the block is set although a decent amount of push rod clearance work needs done to the head

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