Im currently forging my 4e block i have wiseco 74.5mm flat top 9.1 pistons and scat rods, what thickness headgasket will i need to use? will the engine be reliable to hold 300bhp? here is my specs list: *arp headbolts and main. *mls 1.9mm headgasket. *wiseco 74.5mm flat top pistons. *scat rods. *acl full bearing kit. *stock 4e head.