Personally, I would do as Lee and Tony suggest. The odd fire PRV is longer stroke and smaller bore, associated with that the block is machined differently to the later even fire PRVs, and the larger bore liners and pistons will not simply drop in... you will need to machine the block. Numbers simply put on the page, but do hide considerable practical detail... if you do the research you will find.
My suggestion for a road car with 200hp, would be use the 3ltr even engine, and keep to a know recipe... alternaively find an OE 24V n/a and put that in... but 12V option as below...
So, 12V even-fire 3ltr- to cut to the quick for you, bit like visiting McDonalds for a pre cooked meal... get the larger capacity even fire Safran PRV, and just do the following:
1. Buy Safran 12V 3ltr even-fire engine, and get the ecu (Fenix 3A) with it as a starter for 10.
2. Dismantle the bottom end only to change the main cap support, and engine mount plate. Do same with your current engine, use your current plate on the 3ltr even-fire to rebuild. This is straight forward enough... again, simple words on a page, you need to research. This will allow the Safran engine to be fitted / bolted to your engine frame in the A310.
3. Take heads off, change cams for the right uprated items, replace rocker arms, modify heads for increased compression rebuild. No porting required for your power goal of 200hp.
4. Add throttle bodies, injectors appropriately sized, and nice headers.
5. Add high pressure fuel system.
6. GTA Turbo flywheel if using Renix / Fenix ecu.
7. Joint it all up with the ecu... job done
If you don't fancy that, pop down Macky D and ask for a nice cheese burger and fries, and contemplate....
Proof - 3ltr even-fire PRV V6 from a Citroën I think in this case, old motor, 174k km, bottom end not touched, pistons not removed, all left as it was... items 2 to 7 above applied.. no porting, nothing fancy, just big throttle bodies, cams, and headers...
Result 238hp, on old tired piston rings and valve guides, smile :-P
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