Mmmm. I have been doing the measurements and realised that its 1252mm in length but I am assuming that includes the Bowsprit as according to texts, Thunderer and Bellona were 166' and 168' respectively and launched within a month of each other. 166' is 1060mm. According to the scale calculator her main lower mast is 10mm diameter and 245mm long at 1:48. I have to check this with the AOS.
I was keen to do building a 74 as I served on exchange posting at HMS THUNDERER in Plymouth during the 90's as an engineering instructor to graduates.
I am sure that you have the requisite blocks etc to suit.......