Well you have a stirling buddy in Well and Id say you better take him up on his offer cause I think Well's gonna sink in the next quake
Keep us informed!

P.S> Stirling have you ever heard of the "rotonengines" rotary valve head they are building for the K-series in England???
as an aftermarket head with almost triple the cfm of its poppet valve twin cam?? Its going to be offered much like the KAD for minis, but for all kit cars running K-series rover engines eg. caterhams and others.

cg13 or the mini sr 1.3 is usually front wheel drive and theres one for sale on Feral's site ratdats.com.au for 700aus he said that apparantely someone in NZ put a worked one in rwd datto and spins till the cows come home. Hower they have small room for high po (around 78hp factory) for such small ports close to water jackets and lack of stroker cranks to bring it up to rock.
The suzuki g16b from the baleno is all alloy and flows 40cfm standard more with its 16v sohc than the restricted water jacket lower flowing g13b gti twin cam 16v engine. Its all in the ports!!!!

1200rc do you know if the j15 is still in the ute at PAP?
i wonder if you can get 76-79mm pistons of that bike engine to fit??? and yes pls find out which model.

Extra webbing, crank revision and other crap adds 24kgs. Its a fat bastard but strong one.

If it works for you fantastic.
The reason I never thought youd go for power or an sr is because I thought you are trying to upgrade the a-series by keeping the block which will make it pollution type with no probs on catalyc convertor and the such of later engines.
In theory the things youve solved, are yet to be tested and yes I would love for you to succeed dont get me wrong. Its just that the BP is an improvement over the b 1600 and thats cause of better ports as shown in pics and higher port design. Its just a shame that since you are going through so much trouble you arent using whats even better.
Good luck with gasket hot spots, setting up a chain or cam belt, modding or making the cam gear, running 3 cams like the early 1600 ford lotus engine, getting the timing right, and all the money youll need for getting it to run the needed extras. Unless you have cash to burn or engineering buddies to help you, youll need all the luck you can get.

http://www.geocities.com/MotorCity/Pit/3823/blue2.html

http://www.geocities.com/MotorCity/Pit/3823/specs.html

They came in bluebirds, homer vans, prince skylines, late datsun samurai and many others

Pls note: Im trying to inform datto lovers on salvageable possible high performance forged goodies maybe available near your area wether youre in india, mexico or where ever!
I just got dble valve springs from a j series 1300cc.

Get ready to see the most amazing historical site and youll learn to see about the most amazing ohv and soch engine ever!
Pitty there arent many engine shots! but its one of the best sites ever for all dattos and youll love the 1000 section.

http://www.geocities.com/MotorCity/Pit/3823/blue.html

www.geocities.com/MotorCity/Pit/3823/truck.html
J cranks came in 3 and later in 5 main bearings as listed in many datsun historical sites. Which year they turned to 5 is not clear. At 77.5mm stroke for the j13 and j15 and bore at 73-78 even the a10 with its 3 main bearings could see a future to 1500cc and being forged could handle big hp like the mini a-series strokers. 1480cc mini a-stroker 154hp with 3 mains are common. Theres also a later j16 and surprise surprise Mexico's "datsun samurai" got a j18 from 81-97 and that crank is 5 mains as well and about 88-90 mm stroke.

http://www.maneklalexports.com/English/Crankshafts.htm#NISSAN

http://www.kb-silvolite.com/slvpg70.htm

http://auto.pantaiwan.com.tw/Piston/PISTON-NISSAN&D.htm

Crazy fact: The Mexican Datsun samurai came with factory twin 40mm Dellortos!!!!!!!
try a text search in link: http://www.digest.net/alfa/archive/v7/msg02776.html

Would make a beaut stroker 1740cc turbo a15 engine with the 79mm bore.

More info needed please help someone.
Theres a j13 bluebird 68 model Im about to strip at the wreckers nearby but there are measurements in inches of bearing sizes on the net I cant work out.
1200rc do you know what year that ute was??
Id love to be able to stroke my a10 and my a15 with cheap nissan forged steel cranks that are otherwise going to disappear in wreckers throughtout the world.
Need more bloodhounds searching the web and contacting anyone old dude who knows about them before they die of old age and the possibility of the J cranked a-series vanishes. Just type "J15" or other j16, j18 and see what happens.

Unfortunately 116 is nothing if you look that in 1972 the 2tg toyota 2 valve 1600 produced 126 hp NA and no injection. The famous "R" 1600 pushrod engine on fairlady 1600 produced 96hp on twin sus and factory u20 2ltr sohc fairlady engines 150hp from factory at 6000rpm!!! with perfect torque and power curves now thats a super beautiful engine with complete drivability!. The secret is in the 89 bore with 92mm overbore I think (most engines under 80mm specially mazda 1600) that accomodated huge inlet valves high port design and shorter stroke. They are 2 valve setups as opposed to 4!!!. So Im afraid the mazda tc head is a waste of time unless you can fit a tc design like late toyotas 3sg lexus design were the ports are higher better angle and square rounded corner inlets.
Its better to get an "R" engine or the u20 soch witht the factory 150 hp found in the 2ltr fairlady rebuild one and turbo it. I say this because you can get these engines from a growing amount of newer owners of these old cars who are making conversions to import turbo sr20s cause they dont want to rebuild them. Youll stay all nissan too with no major mods.
The thread I posted explains why the fs3 mazda engine kills even the latest bp 1.8ltr mx5 engine in head cfm flow figures and overall hp. So unless you can fit a honda or other head on an a-series its a lost cause unless you think you can get more than 250hp from the setup. The e15 bathurst turbo exa got 250 in pole sprint setup. You have alot of work to do only to attain what you can with an a-series pushrod. Plus you dont know how reliable your setup will be with the possible hot spots bringing the curtains down on your engine cause the oil gallery and water setup doesnt do its job properly as it was originally designed to do.
Theres alot of jargon about twin cams as only a few 1600 non vvt or vtec Twin Cams produce big numbers and those are not by mazda pisstons. So a 1990s mazda twin cam 116hp is a bees dick compared to 40 year old Nissan factory ohv and soch tech.
Matt, seriously add up your plusses and minusses for the conversion research cfm figures for everything I mentioned, youll see that there are better solutions from our friend nissan.

Hey 1000 lovers look at this link and tell me if this would be the best alternative for a crossmember that can eliminate the leaf setup. Dattoman1000, doctafunk and others let me know your thoughts.

http://www.ratdat.com/features/mira410/6.1_chassis.html