Couldn't go wrong with either choice, lol.I'd buy up GT40 intakes and intake plates NIB and just sit on them for years.
Or just buy Amazon stock back in the day and not have to store anything. $2.40/share in July 1997.....and $2300 today
Thanks, the next time I open it up I will take a pic.Rear of block at end of lifter valley will have a partial VIN stamped. What is it?
Three bar heads with FORD oval cast, GT cast, and Date cast inside in the valve train valley, GT is cast outside the valve cover on the front corner of the head. I can not see the bottoms of the heads. it does not have the 1.7 rockers like yours. The seller said the builder told him it was a 275 HP crate that he thought with the long headers, cold air intake, and Endlebrook intake, 600 cfm carb, was 300 hp range? I wish he had documentation for all of it, but I just have a pretty truck that runs strong for a 302. LOLWaughoo... Did we help answer your questions.
Have you been able to check which type of GT40 heads you have? Not sure what state of disassembly your engine is in (you mentioned valve covers off) but the casting number for the heads can be found on the underside of the head in the lifter valley. Pictured engine has the 1.7 pedestal mount roller rockers like a Cobra would have from factory.
The way to identify which type of GT40 heads you have are:
- 3 or 4 bars on the front (93-95 Cobra, Early Explorer, Lightning will be 3 bar). GT40P is 4 bar
- Top outside corner of head, does it have 1 or 2 holes? Pic here is of Explorer head with 1 hole. My post above shows 2 hole with air injection port. 2 hole is 93 Cobra (not sure on 94-95 or Lightning)
- Casting number of heads. Found on the underside of the heads in the lifter valley approximately where shown. 93-95 Cobra, Lightning and some Explorer are F3ZE. Published identification charts list F1ZE for Explorer 3 bar heads. I personally have not seen any (my sample size is 3 sets of Explorer 3-bar heads, all F3ZE's)
- Exhaust port air injection bump and holes. All F3ZE have the bump, 93 Cobra has the holes, Explorer heads do not have the holes.
Hope all the info shared in this thread has helped to answer your original question. What have you determined you have?
I have even more questions now. The 275 HP Crate motor sold by Ford Motorsports is looking like more of a possibility? The build is 12-15 years old now but only has about 10k miles on it. I bought it to keep me busy and it has done that. I wanted a 55 f100 since my early twenty's and decided to pull the trigger a couple of years ago. I wanted a pretty much turn key that all of the hard work had been done on, just do my finishing touches.Waughoo... Did we help answer your questions.
Have you been able to check which type of GT40 heads you have? Not sure what state of disassembly your engine is in (you mentioned valve covers off) but the casting number for the heads can be found on the underside of the head in the lifter valley. Pictured engine has the 1.7 pedestal mount roller rockers like a Cobra would have from factory.
The way to identify which type of GT40 heads you have are:
- 3 or 4 bars on the front (93-95 Cobra, Early Explorer, Lightning will be 3 bar). GT40P is 4 bar
- Top outside corner of head, does it have 1 or 2 holes? Pic here is of Explorer head with 1 hole. My post above shows 2 hole with air injection port. 2 hole is 93 Cobra (not sure on 94-95 or Lightning)
- Casting number of heads. Found on the underside of the heads in the lifter valley approximately where shown. 93-95 Cobra, Lightning and some Explorer are F3ZE. Published identification charts list F1ZE for Explorer 3 bar heads. I personally have not seen any (my sample size is 3 sets of Explorer 3-bar heads, all F3ZE's)
- Exhaust port air injection bump and holes. All F3ZE have the bump, 93 Cobra has the holes, Explorer heads do not have the holes.
Hope all the info shared in this thread has helped to answer your original question. What have you determined you have?
Any idea where I could look to find any of that literature? Just search ford Motorsports and see what I can I guess. Thanks for the lead.I don't remember the exact details, but back in the day Ford Motorsport had a "Cobra" shortblock and longblocks.
I remember the price of $1200-$1300 but I do not remember whether it had the heads or not.
They could have been just using the cobra name to sell engines.
I also could have sworn you could choose a B or E cam.
Wow Thank You.There’s old catalogs on what. Not sure what it’s worth it to you to find this info out.
I just bought a 2003 catalog so I can find out for you when it arrives
That all should be present with factory 93 Cobra heads and Explorer heads. Feel on the back of one of the heads, above the freeze plug. Is there 1 small hole or 2 holes, one smaller, one a bit bigger. Can look with a mirror or maybe take a pic with a phone.Three bar heads with FORD oval cast, GT cast, and Date cast inside in the valve train valley, GT is cast outside the valve cover on the front corner of the head.
Wow Thank You.
That was my "golden age" of owning a Mustang when GT40 crate motors and cobra intakes and 98 cobra wheels could all be bought new
That all should be present with factory 93 Cobra heads and Explorer heads. Feel on the back of one of the heads, above the freeze plug. Is there 1 small hole or 2 holes, one smaller, one a bit bigger. Can look with a mirror or maybe take a pic with a phone.
Looking at the pics in post #15, put your finger in the freeze plug indent. Move up from there. If there is 2 holes directly above (as shown in the pic) then you have Cobra or Lightning (or possibly crate motor) heads. If there is only 1 hole, then you have Explorer heads. At least it narrows the field of possibilities of what you have.
The Cobra roller rockers can be found on eBay for $150-200, sometimes less, and I would expect possibly lower if someone has them for sale locally. Look around there are lots of them out there.
I have not found a VIN on the block as yet. I have not looked behind the distributor yet since it is a pain to do. I started upgrading the fuse panel and doing a rewire so that has all of my attention at this point. It didn't really need it but I didn't like the way it was done previously. You know how it is, you just can't leave something alone if it's not up to your standards. LOLAh...the good ole days.
I don’t see any particular crate motors that would match up.
Any luck checking to see if there was a VIN back there?
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