Bus 2.0l vs 1.7 914 Motor Dilemma Options

[Montroe]

I recently purchased a 74 914 with what I thought was a 1.8l engine with low compression on all 4 cylinders. My plan was to get the heads cleaned up and have new valves and guides installed and replace the pistons and cylinders with a 94mm set. After removing the engine, I found that the block does not have ID numbers in either location, the heads are 2.0l bus heads 022 101 372G and the pistons and cylinders are 94mm. If it is a bus block, the dipstick has been relocated. I also have a 1.7l long block W0093163 with 022 101 372 heads that is also in need of refreshing. So, should I have larger valves (42mm/37.7mm) installed in the unidentified (possibly bus) block and go with 96mm P&C's or go with the 914 1.7l block and have the heads opened up to accept 96mm P&C's and maybe have larger valves installed as well? Either setup will be fed by Weber 40 IDF carbs. Thanks in advance for the advice.

[914Sixer]

Use the 1.7 block and the rest of the 2.0 bus parts. All the internals are interchangeable. You can use 96 mm PC because they are slip in. Use the bus heads. You do not say what you are using for fuel.

[Montroe]

Use the 1.7 block and the rest of the 2.0 bus parts. All the internals are interchangeable. You can use 96 mm PC because they are slip in. Use the bus heads. You do not say what you are using for fuel.

Thanks for the response. I was planning to use regular 89 octane unleaded. Is there a reason to use premium?

[Bob L.]

Use the 1.7 block and the rest of the 2.0 bus parts. All the internals are interchangeable. You can use 96 mm PC because they are slip in. Use the bus heads. You do not say what you are using for fuel.

Thanks for the response. I was planning to use regular 89 octane unleaded. Is there a reason to use premium?

I think he meant fuel injection/carbs/microsquirt