Sorry, I was asking Spank since he is also in SoCal. I guess I forgot to hit the "quote" button. 

I'd like to help you but we are at least 3000 miles apart. I have a complete MG Metro power unit converted to mini use. I have talked with several people about building to their spec. John, I'm thinking your figures are a little dated. I have four engines in the machine shop and the one I called about yesterday has a bill of $970 for machine work alone. Core prices for 1275s are way up as well. You know something is wrong when people are asking for money for core 850s and 998s.

For myself the smaller the over bore the better. My current power comes from the first Cooper S engine I bought back in 71. It has seen duty since then as a 1275, 1293, 1310, 1330 and now 1360. With a rev limit of 5000 rpm now ( as a national Solo 2 car it was turned to 9200 RPM ) it sould last a long time. Steve (CTR)

Bore clean and hone block

install cam bearings

install brass freeze plugs

press pistons and rods

surface block

grind crank shaft

balance assembly

Valve job

install valve guides

install hard exhaust seats

surface head

On a balance job we use a new light steel flywheel and two part S balancer.

Otherwise surface flywheel and replace ring gear would be a cost This unit got new rods or recon rods and check side clearance would have been added

I'm in SoCal. Can you help me?

Sorry, I now this thread is years old but I happen to come accross it today. 

Is it possible you can at least tell us what state or country you are located in. There are some here who expect at least that much info in exchange for the answers to your questions. Steve (CTR)

What's involved in a bench test?

There are several factors here, one being how much the 998 is going for,  where you are located, as you are starting with an 850 there's other things to look at/for (BRAKES for example),  As you state 1340 you may want to check out 1380.

What budget are you allowing for your engine?  At a guess you will need upwards of $1,000.00 for a core 1275 engine, and then around $2,000.00 for the rebuild that would allow for the bearings, gaskets, some machining (turning crank for example), a camshaft, and pistons.  Extras are well extra - things like rebuilding the transmission, bracket for shroud to thermostat cover (different from 850 - 1275)

I'm in NY and have a 1275 which I'd sell. Why start with a 998 when you want the 1275?

em me direct for details. No idea where you are. Fill in what state you reside in your profile and others might contact you.

Search this forum for reference to 998 engines... there are a few recent posts about this same issue, and many very knowledgable advice in those threads.

IMHO the 998 is a good start.  Overbored and has the 1275 head... other specs would help to know, but seems like its a good starting point.

If you are going to rebuild a motor, the basic price won't change in terms of just a rebuild... but guccci parts and performance mods on either will cost.

Good luck.

if you're in SoCal I can help you.

" I was told the cost to rebuild an 850 would be the same as rebuilding a 998 or 1275". Exactly! But why buy a 998 when you ultimatey want a 1275.

The entire car came in boxes as well as the motor!  I have put the car togeather but not sure what all is missing if anything for the motor.  I was told the cost to rebuild an 850 would be the same as rebuilding a 998 or 1275 so why go through the bother if going faster is the ultimate goal.  This is my first mini and it's definately a learning process.

A series motors are quite tough and often work OK even after sitting unused for years. However, in your case you already have a non-working motor so there's no point in getting another one and since it has been modified I would be skeptical. I would ask that the seller prove it works by bench testing it or discounting the price. Since you plan on a 1275 eventually and an intermediate motor would be waisted money I might try to get the 850 going. Do you know what's wrong with it? Do you have the where with all and facilities to fix it yourself?

If the price is right...why not consider the 998? ( if no tear down is needed )

If the price is similar to a 1275 ( if you can find one )...it's a no brainer

Please fill out your profile, with location, as someone local may be willing to go look at the motor for you and provide pointers. 

I have a 63 Austin 850 that has never run but I would like to upgrade to a 998 or 1275.  I have found a 998 that has been bored 30 over with a 1275 head but has sat for a number of years.   Owner claims it was fogged it and has oil in all the right places.  Is this motor something I should even consider?  What would be the pitfalls as far as the seals go?  I just want to get this mini on the road and then work towards a 1340 or ?