i am building an NA carbed 289 in a 64 1/2 coupe. I amnot looking to rev any higher than 6k.
I am going to use a 4spd toploader and 4.1s or 3.7s in probably the 8.8 size. I am not looking for some 700hp motor, just 300-350 whp.

options:

one

bare gt40p cast iron heads
6m9 and 8f18 are stamped one on one head theother on the other and GT40P is on both

two

used 5.0 HO heads
8f8 stamped on both
full valvetrain
third

allegedly the stock 289 heads
5e3 and a 5e4 one on one head the other on the other and 65 on both
full valvetrain

all are cast iron

any suggestions on which to use?

thanks 8D

 

there shoudl be some diffent casting numbers they will be like C8AE-9431-B

get the first four number off of the 289 heads (c8ae) and let me know what those are.

 

i looked on the 289 heads and found no other numbers besides the ones listed.

perhaps i am no seeing them. where might they be?

 

if i remeber right you have to look at the combustion chamber side of the head and they are above one of the intake runners. its been a while since i looked at a set though.

 

sorry for being a noob here, but that is 'underneath' the head right? (just confirming)

 

id good with edel perfomers..get 1.94 intake valve if you got stock type piston..they got 170cc intake runners .good street head.will need adjustable roller rockers too.

 

i got a set of E7TE HEADS. ported heavily on the exhast side ready too bolt on with stock type rocker arms..

 

yeah it will be on the combustion chamver side fo the head.

 

i think the gt40 heads will be jsut about *** good as a good proted e7 head.

 

sorry i am not looking to buy any more heads. i want to use the ones i have....

i'll get the numbers when i get back in town ty