I know this is an old thread but I just joined in the last few weeks and wasn't sure where would be the best place to make my first post. I recently bought a rebuilt OZ250-2V head and intake off of eBay from Aus Ford Parts and was wondering if anyone has ever delt with them? My plan is to install the head on my '67 mustang convertible. I restored the car about 10 years ago and it is mostly stock except for a pertronix ignition and coil, 14x7 aftermarket rims with P235/60R14 Cooper Cobras, 4-lug power front disc brakes, and a unisteer manual steering rack. Except for the pertronix the engine is a basic bone stock rebuild with less than 10,000 miles on it. The car has a rebuilt C-4 automatic and the original 7.25" rear axle with a 2.83 gear ratio. I use the car primarily for cruise-ins and car shows with occassional pleasure cruising.
I have received the 250 head from Aus Ford Parts and done a preliminary examination. The casting code on the head is ARD10E 6048 AC. The head was rebuilt using the original valves. One of the exhaust valves shows some pitting. I removed one intake and exhaust valve to measure them. The stems measure 0.344" in diameter so according to the Falcon Six Performance Handbook they are non-US valves. The intake measures 1.770" and the exhaust measures 1.476". This is confusing to me beacuse the OZ-250 section of the FSPHB says that 1.75" intakes were the largest intakes offered. The measurements were taken with a pair of calipers. It looks to me like a 3-angle valve job was performed. Not sure if hardened exhaust seats were installed. The head does not have a port divider but it looks like it may have been ported as the bowls and runners have a smooth surface and the exhaust ports flare out a bit at the gasket surface. There are no cast circles in the exhaust port ceilings except for no. 3 and no. 4 which also are the only place in the runners to have a rough cast surface. The retainers are one piece and look very similar to the 260 V-8 retainers in the FSPHB. Not sure how to post pictures but once I figure it out, I will post some.
My plans are to measure the combustion chambers to determine how much it needs milled to get it to the 67 200's 52CC size. I also may weld in a port divider before taking the head to a machine shop to have it checked out along with milling it and facing the exhaust flange. I am not planning to replace the valves and springs at this time as they are pretty good sized. Because my engine is rebuilt with low miles and in the car, I am reluctant to do a cam swap. I am, however, seriously considering a set of 1.6 roller tip rockers to gain a little more valve lift with the stock cam and the ability to adjust the valve lash. For exhaust, I plan to get CLassic Inlines header and install 2" dual exhaust with Flow Master mufflers. Because I blew my budget on the head, I plan to rebuild an autolite 2100 2V that I have lying around. I need to check the size but it is for a '67 289 so I am guessing it is around 300CFM. I also have the load-o-matic distributor so to save money I was planning to rebuild a distributor from a '71 250 and convert it to a Pertronix ignition. Any advice concerning my plans would be appreciated.
When I do, I will post pics.
Broke Cam in half, metal parts all over the oil pan, and upon taking it apart found that a rod bolt snapped and did quit a bit of damage, cylinder wall damaged, crank damage and the block would need to be checked for cracks? Well now I'm trying to decide if I just look for a new used block and rebuild the 200 cu.in. or look for a 250 cu. in. and make the swap over? Well hope you all are doing better 
