1968 327 4 bolt main

so i took my motor that some1 gave me and it turns out it is a 327 4 bolt . What are the odds of finding this engine. it is dated nov.3.1968. What should i do with it ? what kind of torque/hp app can i run with this for a 72 impala 4 door  

how about the rpo numbers stamped on the front right deck????    it might be a really rare block and possible trading material ...    throw a casting number up also...  

the casting number is 3932386. casting date is k308. Found some numbers saying 19z33290 and some others saying T01(or I)20HA. HAVE 2 PAIR OF HEADS . 3932411, B27-9 AND B25-9/// OTHER HEAD SAYS 3947041 ..
BLOCK ALSO HAS H40 STAMPED ON IT .. AND 386  636
                                       374  678.  

It came factory with 275HP.
The 3947041 heads are decent heads.
How much power are you aiming for and then I could list a combo for you if you want.  



Professional Hi-performance engine builder

i would like anywhere from 350-400. also , because my car is so heavy. I want a ton of torque. This car is most likely around 3000 maybe more lbs. its a 72 impala 4 door sports sedan.  I need good acceleration to get up and move in this boat. Daily driver and weekend cruiser.  

Do you know what the car weighs.  



Professional Hi-performance engine builder

1972 Chevrolet Impala


3,864-4,150 lbs  

Do you plan on a complete rebuild.  



Professional Hi-performance engine builder

yes, i do. the block is at the machine shop as we speak. still has . crank, cam, pistons. i have the heads. goin with new heads tho. dont think i will rebuild them.  

If you do use one of the sets of heads you listed use the 041 heads they are decent heads.
What is your budget like and then I could list a combo of parts for you.  



Professional Hi-performance engine builder

i have the most minimal of budgets. alot of work will be done by me researching and doing things myself. junkyard finds and such. what little money i do have to buy new parts i will. this is something i know will take awhile to get things just right. if i have to save for good parts i will. there is no rush on this project..  

Do you know if the valves in the 041 heads are 2.02/1.60 or 1.94/1.50.  



Professional Hi-performance engine builder

naw, i dont. most likely they r stock. what ever that is. how can i find out ? is there a way i can measure on my own ?  

Yes use a measuring tape and measure the valves be sure to measure across the center of the valve if it is under 2 inches then they are 1.94 and if they are 2 inches then they are 2.02 valves.  



Professional Hi-performance engine builder

when u say across the center do you mean width wise from the ports that are side by side or just one port at a time ? maybe if you have an illustration or can direct me to one to get the measurements right.