SSilver Bullet

So I'm picking up a pair of stock 243 heads and I already have an MTI X1 (230/227 .591"/.571 on a 112) cam, first time tearing into the motor. What supporting bolt on's should I get. Springs pushrods etc..?

SOMbitch

iTrader: (8)

Count on springs/PR's and most do oil pump and upgrade to an LS2 timing chain also since you are already there. If you are ever gonna do a UD pulley now is the time since it will come off anyway...

Edit: Since you are doing heads might wanna consider lifters and definitely throw down $30 for LS2 lifter trays.

KevinR

ARP head bolts since you are swaping the heads out IMO.

batboy

iTrader: (6)

Spring and pushrod kit:
http://www.texas-speed.com/shop/item...d=172&catid=54

Basic head and cam gasket and bolt kit:
http://www.texas-speed.com/shop/item...id=87&catid=36

If you have high miles, then also get at least a LS2 chain upgrade and oil pump (will also need an oil pickup o-ring if replacing the chain and/or oil pump):
http://www.texas-speed.com/shop/item...d=620&catid=53
http://www.texas-speed.com/shop/item...d=215&catid=55
http://www.texas-speed.com/shop/item...d=815&catid=36

Like was said, this is the perfect time to go with an UD pulley (will also need new belts). This is the one I'm running:
http://www.texas-speed.com/shop/item...=1004&catid=16

Don't forget antifreeze and then change oil and filter afterwards.

Squirts11

iTrader: (14)

Not sure what size injectors you have, but you might want to consider upgrading, particularly with a medium-sized cam and the addition of heads.

SSilver Bullet

Thankks for all of the suggestions, and the links to vendors

bobyboy101

iTrader: (6)

if you can budget it might wanna go with a intake aswell fast 90/90 are dropping in price.

printmanjackson

iTrader: (1)

would a fast 90/90 intake not flow more than the stock 243 heads?

SSilver Bullet

Should pick up a little power with the fast 90/90 I'd think, but the X1 is a reverse split cam so it likes the restriction on the intake and loves the free flowing exhaust so I'm gonna stick with the ls6 intake for now.

99LS1Bird

just make sure the springs are rated for atleat .600 lift, arp bolts are a good investment if you ever plan on pulling the heads off again soon or are planning on spraying it. the ported ls6 oil pump is a good investment and atleat a ls2 timing chain if not a double roller. if you do go double roller stick with the ported ls6 pump due to clearens issues from what ive been told.