Hello every one kind of new around here so bare with me . I have a gen lv 454 bored 30 over with trw l2399 Pistons assembly is balanced . It's been sitting in my garage for 20 years along with a set of old 820 heads with 2.19 and 1.88 valves no bowl work or any grinding . Now the guestion would like to make 500hp give or take , no cam or intake at this point . Exhaust will be old nice on logs and over transom . The boat is old school 18' Kindsvater with a casle v drive don't know what gears at this point are in it . Any opinions or harassment would would be awesome . I know this is weak hp for some but it's a crusier . Thanks Dave .