396+afr head question.
 

so i bought a 396,with -5 pistons.im planning on going with the afr#1057 heads.

1057 AFR SBC 210cc LT4 Race Ready Reverse Cool Heads, L98 angle plug, 76 1 pair 2070.00
(Specify chamber size 58cc - 76cc, intake bolt pattern), complete w/parts


is there anything i need to know about these before i just order them,will they work with my pacesetter headers?will they work fine with a lt1 manifold.

what is:L98 angle plug