A buddy of mine bought these, but decided to go another direction.

Stage 3 GTP ported 862 (4.8/5.3) castings
66 cc chamber
2.055/1.570

LIFT INT EXH
450 291 221
500 310 227
550 328 231
600 342 233
650 346 234
700 353 236

Valves with a 5 angle valve job, dual coil valve springs (.680" max lift) custom from GTP. Ferrea Stainless valves
and Titanium retainers.

These heads retail for $3,500.00

$1,900 plus shipping.

 

got flow numbers below 450?

 

I'm sorry I don't. The numbers shown were all I was given by the original owner.

 

Bump....

 

What kind of power would these produce over stock with say a 232/230 + 112?

 

Have you had them flowed? Those #s seem a bit high for an 862 casting. Also do you have a link to them new?

 

All I can tell you is what the original owner did with them on his car. Here is what he told me:

motor the heads were on
408, All shelf internals.
6.0 Iron block + .030”
Eagle 4.00” stroke crank
Crower Sportsman 6.125” rods
Diamond 11519 4.030” pistons with 2cc relief
Mahle rings gapped for 250 of N2O
all arp hardware
Comp 850 lifters
a Cloyes hex-a-just timing set,
ls6 ported and shimmed oil pump
Custom-length Smith Bros CM pushrods,
CM 253/257 64x/64x” 113+3 cam

552 RWHP 507 RWTQ

 

holy duration batman! free bump for ya

 

The #s seem a bit high to me also but good luck with the sale

 

Bump....

 

If you've never heard of GTP then you wouldn't know the numbers are completely believable, Craig does some of the best work in the business. I don't know the OP but just wanted to back him up on the heads because I've ran a set before and they truly are badass heads.

 

I originally had this set of heads done by Craig for the original owner and built the 408 they were on. They need a 4" + bore and are a steal for $1900.

 

Thank you for the reply!

Bump.

 

Bump......

 

bump for a great seller, and a badass set up!

 

Back up top.

 

PM's returned. Still for sale.

 

bump for some bad *** heads wish they werent 5.3 heads tho

 

Still for sale.. obo.

 

Back up..