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If you are using the standard compression height Twin Cam piston then the conrods required are the standard 1600 crossflow items that would have originally come with the 1600 crossflow crankshaft and block.
Approximately 0.225” will need to be machined from the block face and a spacer plate will be required to increase the height of your existing front covers.
In addition to that you will require a longer set (3) of front cover to head bolts, a longer timing chain tensioner plunger, a longer 122link timing chain and a spacer to sit under the head to block breather tube. All the parts are available from either QED or Burtons.
The head stud holes in the block may require tapping out slightly deeper to stop the bolts bottoming out in the holes.
They will not require drilling as the holes will be deep enough, but the use of a 7/16 UNC plug tap will take the threads to the bottom of the existing holes.
If you do not want to machine the block face to that extent then a higher compression height piston set and a pair of taller front covers (with a modular water pump) are available from Burtons. You can then use the 1600 crossflow conrods and retain a full height block.
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1972 Ford Escort GT1600 Twin Cam
1980 Ford Escort 2.0 Ghia
Peugeot 505 GTI Wagons (5spdx1) (Autox1)
2015 Honda City 5spd.
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