a 998 or 1100 crank will not fit in a 1275. The latter has 2" mains, the 1100 has 1.75" mains.

The only 1100 that has 2" mains is the later A/H Sprite, but it's a north south crank.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

"One other question. Can you put an 1100 crank in the 1275? TK mentions it in his for sale thread."

No I don't

Maybe your getting confused with my South African 1100 crank that is for sale? That will fit a 1275.

Do the Morris 1300 (1100S), run the same gear changing mechanism as a mini? I guess the diff is different for bigger wheels and presume the remote/rod mechanism is different as well.

1100 all the way maaate ...stuff the 1275...everyone has one of them

in regard to 998/1098's struggling up hills...HAHAHAHAHA!!!! My totally stock 998 LOVES hills...I was amazed at first, but I can climb a winding hill in 3rd easily! I drive one particularly steep, hilly road every day, and never feel inadequate

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Website: www.justanothermini.com

Umm
The 1100s runs a slightly different remote change - its different in that it runs a sandwich plate btween the remote and the gearbox. The mini K, deluxe etc didn't run that plate, but they all can be made to fit.

The morris 1300 is a later model and although I am not sure, I think it has a rod change mechanism.

Doc ?????

However, just about all motor models can be made to bolt to all gearbox types. Most just simply bolt up.

Yes and no.
It's a remote shift, but there is a rubber sandwich plate between the remote and diff housing. This is to ensure the shift is as imprecise and rubbery as possible.
You can get a steel sandwich plate from MiniMania site, or, swap to a Mini remote and diff housing.
Also, these are only 3 synchro boxes, not 4 synchro.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Morris 1300 were all autos, they came out same time as the largely unlamented Morris 1500 5 speed manual. Which had an early cable linkage...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

But Anton, Lillee's 1098 is not just "adequate" she accelerates up hills! I drive the back streets of Lane Cove to work twice a week and there are some very steep hills there, no problems at all! other cars have trouble

I too asked this question about 1275 or 1100 build, I decided on the 1275 build. But secretly, I really do like my 1100 and don't plan on selling it. On the contrary, keep it as a spare for that immaculate mini K rebuild later in life (including this rocket prepelled GR 12G295 head)

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Lillee - 1969 Morris Mini K

for a 998 or 1100 to make the same power as a standard 1275, it really needs to be a screamer, and the build is going to cost more than to build a standard 1275.... so if you want to spend the $$ to build a screamer, wait for a 1275 and make that scream - easy

put it this way too - my S was running like crap at the dyno day in sydney last year, first run it wouldn't go over 4500rpm, and was just below the top 1100 on hp, I fixed the plug and points gap and then pulled 5hp more that the top 1100 - the motor is now sitting under the bench waiting for a rebuild cos it's out of compression and oil pressure, as it was when it was on the dyno

point made...

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did I tell you that I won a trophy?

Hi - 1275 are the ultimate prospect

nothing has changed - money spent for performance gained is far better and will give you at the end more satisfaction.

Don't get me wrong - small bore motors can achieve great results however compared to a 1275 it is really academic as the 1275 output is easily tapped into

Greig...

Welcome Aboard Greig.

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GR also told me that the 12g head is just too big for any small bore. His words not mine, I know a lot of people are doing it.

If I have not found the right 1275 by the time I finish all the body work (hopefully have a lot more done after this long weekend) I will probably continue with the 1100 rebuild. I can alway put it in Bromley later in life.

Wait out for my future threads on gearboxes etc

Can someone please sell my van hihihi

Yes - welcome Greig
An interesting group

Hmmm... having owned a 1220 years ago with Imp pistons, a 544 cam, twin HS4s and a 12G940, all I can say is it went, like shite off a shovel.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.