The hammer might drop in and work fine but the rear of the frame will likely need to be radiused to accept a beavertail grip safety. Make sure that the primary safety engages properly after too.

Yes they will take aftermarket parts but there is no such thing as a "drop in" part for a 1911 (unlike other handguns) as most things will need minor fitting and blending. I love and work on my 1911s and almost everything requires minor fitting To ward off hammer bity you would be better off with a beavertail grip safety good article on "drop in " 1911 parts https://americanhandgunner.com/do-drop-in-parts-really-drop-in/

Yes they will take aftermarket parts but there is no such thing as a "drop in" part for a 1911 (unlike other handguns) as most things will need minor fitting and blending. I love and work on my 1911s and almost everything requires minor fitting To ward off hammer bity you would be better off with a beavertail grip safety could I recommend the rock Island as I think it has what you will want and you will not be able to put the aftermarket part on for the difference in price budsgunshop.com/catalog/product_info.php/cPath/2084_21_876/products_id/35190/Rock+Island+51431+Rock+Standard+FS+Single+45+ACP+5+8%2B1+Black+Rubber+Grip+Black

good article on "drop in " 1911 parts https://americanhandgunner.com/do-drop-in-parts-really-drop-in/

Yes they will take aftermarket parts but there is no such thing as a "drop in" part for a 1911 (unlike other handguns) as most things will need minor fitting and blending. I love and work on my 1911s and almost everything requires minor fitting To ward off hammer bity you would be better off with a beavertail grip safety could I recommend the rock Island as I think it has what you will want and you will not be able to put the aftermarket part on for the difference in price budsgunshop.com/catalog/product_info.php/cPath/2084_21_876/products_id/35190/Rock+Island+51431+Rock+Standard+FS+Single+45+ACP+5+8%2B1+Black+Rubber+Grip+Black

Yes they will Mike. These are "True" GI Spec 1911's and aftermarket parts for the standard 1911 will be drop in in most cases.