parts list for the 420a

[eclipsetuner23]

Okay im really sorry if this is a re-post but i can't find a thread anywhere! I really want some help on what parts i NEED or what parts are the BEST to do a lower end rebuild and upper rebuild to make around 500to 550 hp and how much it will cost? Again i'm sorry if this is a re-post...

 

[bullitt0713]

i would do a top to bottom check, all your sensors, rods, pulleys, spark, wiring harness, its always good to know exactly how your motor looks and runs and such before putting new parts on, tis way you know it is probably a good chance the new part has something to do with it, also make sure to get a regular tune with building your motor, and always remember build your bottom end as you build your head, i hope it was helpful, good luck, and let me know how it goes man!