As Breeze has pointed out, there are two 88" motors; 88A, the motor in the dyna and touring models and 88B the balanced motor in the softail models and AFAIK, neither came with dual coils. Being a Dyna, the motor is the 88A but the bike is not a 2000 model; no SE dyna in 2000. There was an SE Dyna in 2001 and 2002; the FXDWG2 and FXDWG 3' 2002 was the last year the SE bikes cam with the 88" motor. Being build in 12/99; I would be suspicious of the SE designation since there was no SE FXDWG built for the 2000 model year. The OEM rocker are ratio for both is 1.65.
The motor does not have a model number; it shares the VIN on the frame; they match. I see two different ways for the OP to go but both require bigger bore. I might be looking for another machine shop though; VIN or model number has nothing to do with building the motor and any machine shop that knows Harleys would know what the rocker arm ratio was and wouldn't be asking. No disrespect to the OP or anyone else, but facts are facts.
Regardless of model, the OP is still working with an 88" motor and he has a couple of options to rebuild. Of course there are variations on any theme and more than one way to skin the cat but the two most common are outlined below for the OP to consider. I can get windy but the devil is in the details.
Why stop at .020" over; most boring 88s bore to .125" OS for a 95" displacement but about 6-8 years back that increased to .185" for a 98" displacement. I don't believe the MoCo makes .020" pistons for the 88" motor anymore; all are .010" OS. They may be available from Mahle or Arias but since they made the OS piston for HD, maybe not.
Is the bike carbed or EFI? For either option below, if carbed, rejetting will be necessary and a programmable ignition should be installed as well. Stock timing will be a bit aggressive for any cam and compression upgrade. If EFI, a dyno tune will be required. I hope the bike is carbed since the 2000 models used the Magneti Marelli EFI system and it is getting harder and harder to find tuners that know how to tune that system.
First option for the OP is to bore to 3.875" and order a set of CP/Carillo pistons with a 3cc dome they come with rings and run about $350 a set. Static compression for this setup will be about 9.8 with CCP at about 190psi; anything more is too much for SE 204 cams. Clean the heads up, have a multi-angle valve job done (commonly referred to as a SERDI valve job), replace valve and/or springs if necessary, replace the guide seals and take a very thin slice to make sure the head surface is flat. Use a .030" MLS head gasket and install a set SE 204 cams. Closely inspect the cam plate and oil pump; measure to see if all components are not worn past service limits and replace as required. Replace inner and outer cam bearings; OEM is OK for the outers inners should be Torrington/Koyo B148, the full compliment bearing. Replace the cam chain tensioners with a set of CYCO tensioners. Install the Baisley LMR-002 pressure relief spring for a marginal boost in oil pressure and polish up the little pressure relief piston so it moves freely in the bore.
Second option which would be my choice would be to bore to 3.938' for 98" displacement, a set of Carillo flat top pistons which will bring static compression down to about 9.5 but with a set of S&S 509 cams with an earlier intake close, CCP will still be about 190psi. Same treatment for the heads but use a .045" head gasket instead of a .030". Same treatment of the cam plate, oil pump and cam chain tensioners.
