There will be no heavy configuration. Multiple variants of the single-core NGLS launch vehicle with solids will outperform the DIV Heavy once the upper stage gets upgraded. ULA is looking at modifying LC-41 and SLC-3E only.
NGLS will initially fly with a certain upper stage. That upper stage will be replaced with a newer, upgraded upper stage later on that will improve the performance of the NGLS drastically. I won't post the relative (to DIV Heavy) performance numbers again, because that info may or may not be proprietary.There are no plans for a second VIF at LC-41.
I can say that the Isp assumed by the thread originator is a little higher than what is being projected. Isp for the BE4 will be slightly less than that of the RD-180.
With a 335 tonne first stage (340 sec ISP avg) and an 84 tonne second stage powered by four RL10 engines (450.5 sec ISP), about 8 tonnes could be boosted to GTO. That's nearly 1.7 times more than Atlas 401.
...nearly the same payload could be lifted to GTO with only two RL10 engines, with a 368 tonne first stage and a 51 tonne second stage.
看来NGLS的芯级高度与Atlas V CCB差别不会很大，6助推构型的GSO运力在8-9t左右（Delta IV-H为6.8t）
Let's try working backwards. Current DIV H is around to 15klb to GSO. Size the NGLV-H (with 6 SRB's) for either 18k or 20klb to GEO.
To give you a hint on the proposed length of the NGLS booster, keep in mind that ULA wants to minimize pad modifications. They would want to use as much existing Atlas infrastructure as possible. Major modifications to the VIF, MLP, FLP, etc. are undesirable.