70 vw 1600cc single port Help////?

VW did not make a 70 single port motor they converted to the 1600 dual port heads in 69,if you have a single port intake the motor is a 1200 or 1300, the 1500 and 1600 had dual port heads,the bore size is different and the stroke is different on the single port heads they have a 64 stroke instead of the 69,with 83mm or 85.5 so check out appletreeautomotive.com or cbperformance.com for heads and pistons and changing you point's dist.to electronic ignition.set of forged slip in 87mm piston set is 395.00 heads cost 286 each,cam is 89.00 go with the 110 cam with straight cut gears,and 69mm counter weight crank with 8 dowel pin's.and have the piece of aluminum welded to the back of the block behind number 3 cylinder for more strength,and run an external oil cooler with a fan can get one from summitracing.com for around 145.00.