r4dio78

I Just pick up some 243 heads came off a 07 TB with 22k miles for my ls1. my question is i want to bump up compression. they are untouched heads. I will be doing a heads/cam swap but for now the cam will wait. so for now i want to swap the heads. im going to swap out the springs with some lunatti #73925K1LUN .660 lift so i dnt have to do it later while there on the engine, and there pretty cheap for the price. The cam i want to go with is a TSP 224r lsa 114. O also what push rods length will i need for now with my stock cam since they need to be changed? and after the cam swap?

So if you guys can help me out i would appreciate it thxs.

r4dio78

Anyone?? ive been searching and im thinking i need the cometic gaskets with 3.910 bore with a .40 thickness? can anyone correct me if im wrong?

Sales2@Texas-speed

iTrader: (5)

If it's a standard bore LS1 short-block, then yes, 3.910" bore x .040" thick would work great!

Jon@Texas-Speed

iTrader: (18)

If it were me, I would mill the heads and just use a GM MLS gasket. You can run a Cometic .040" gasket but they are about another $90 or so over the GM gaskets. Also, on the pushrods, it will just depend on how much you mill or what gasket you go with. Your best bet is to get a PR length checker and measure. This will ensure you get the right preload the first time. Let me know if you have any other questions!

Thanks!
Jon

r4dio78

yea i would like to mill them or even a port&polish, but this is my first build and would like to do somthing simple for now and building on a budget right now. But thxs Matt &Jon i really appreciate.

mika401

iTrader: (6)

Thanks for posting this info doing my first build also & will probably get these as well!

01ssreda4

iTrader: (96)

Your wasting your time with the heads and still having a stock ls1 cam IMO. And those dual lunati's are overkill for a TR224 cam.

r4dio78

What do you recommend? im been reading alot on here and ive been hearing that comp 918 have been breaking a now pac springs have been breaking also. the reason i wannted to go with lunatti was because havent heard any bad things about them and i thought the extra lift wouldnt stress out the spings at high rpms.