BigRich954RR

iTrader: (1)

Ok built a nice 427 shortblock been saving up money for heads. but old motor just blew today.

Can i use my old heads with the new short block then a few months later switch out the heads to nice new ones. Is there any issues,with that other then wasting time? Both are ls2 block and heads

98RedBird

iTrader: (77)

Yeah, I don't see a problem with it as long as their both LS2 block/heads. Just make sure both surfaces are clean, use new head gaskets and head bolts and you should be fine.

1CAMWNDR

iTrader: (21)

Go ahead. The tune will need to be updated when you get the new heads though because of the added airflow.

BigRich954RR

iTrader: (1)

OK sweet I hate to use the old heads but the lack of job right now and then shipping out for USMC in 2 months. I just want to drive my car again before i leave

red02Hawk

iTrader: (9)

yeah should be fine, but those heads are gonna be choking that motor

slayerized6

iTrader: (12)

your wasting $$. head bolts and gaskets can only be used once, unless your unsing ARP head studs

crainholio

iTrader: (2)

Running stock LS2 chambers on a 427 will bump your static compression ratio significantly, there's some math to be done if you want to make an informed decision.

BigRich954RR

iTrader: (1)

new block is Arp studs i have 9.8 with 68 cc heads so i might only be at 10.2 with the stock ls2 heads.

Yea i know ill be choking the motor but i blew a rod on old motor and only have 1200 to spend to get it running again. plus im only looking for 800-850 RWHP for now and the stock ls2 was at around 650 with my blower

I just wanted to be sure i wont warp the block or anything using old heads.

crainholio

iTrader: (2)

You might want to actually do the math on it.

What pistons are you running? How much dish?

Assuming flat-tops with 4cc valve reliefs and generic head gasket numbers, you're close to 11.5:1 static ratio just offhand.

BigRich954RR

iTrader: (1)

wiseco 4.125 -20cc dish pistons I think my gaskets are 4.155 bore 50 thickness