I have built many Chevy 2 piece seal GEN 1 engines . But now I have a 1989 350 Chevy truck long block engine . I Want to build up the short block . The heads and TBI set up will be swaped for Vortec heads and a Dual plane carb intake . This engine has a fuel pump block off plate . And I do think it is drilled for a fuel pump rod . Are these 1 piece seal engines any good for HP Builds ?