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| Joined: | 03-12-2005 |
| Location: | Mesa, Arizona USA |
| Posts: | 338 |
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Having said that I believe the car will be worth more in the long run if it has the 907 engine in it. Most of the engine swaps I have seen advertised and sold over the years seem to be less than those that still had the 907. The 907 is what helps make the car. Within the past year here in AZ I have seen 3 project JHs slated for a different engine swap that never got completed. One I rescued (soon to be on the road), another was bought by someone else for parts and the third unfortunately is going to the junk yard.
On to your questions. If your car is an early 73 then it has a rope seal and in order to replace it the engine best be out of the car to replace it. The top end could be valves need adjusting/replacing. Do you know what the pressure is across all 4 cylinders? Are they close in numbers to each other?
Getting the 907 to 200 HP isn't impossible, it just takes longer and costs more. Depending on how much work is needed and how much you do yourself I'm guessing the basic rebuild will be around $3,000.00. Getting to the 200 HP mark figure $8,000 to $10,000.00. Here you need new pistons and cams, a rebuilt 2.2 L crank, Dellorto carbs, rebuilt upgraded head, etc. Again several threads here about rebuilding the engine.
Going with a different engine means new engine mount location, concern for weight vs. balance, height of engine requiring modification to the hood, different trans and drive shaft, connecting to the rear end, clutch mechanism change from cable to hydraulic, etc.
You should be able to find someone in your area to do some of the rebuild for you. Hopefully others in your area here will be able to chime in with their recommendations.