Value of Big Block Chevy CE Motor???

[iluv69s]

I have been offered a 71 dated 396(402) running motor, recently rebuilt with 4k miles... the stamp is CE350491...cast # 3999290....(supposedly a 4 bolt block-but not sure)291 heads dated June 10 and 18,1969......block is .030 over..6223 crank...dimple rods...11.1 to 1 pistons....Edelbrock X intake..low rise..Compcams solid w 605 lift...roller rockers...750 mighty demon carb...dual feed mech secondary...HEI supercoil...Stock 6 qt pan...Cat fluid damper..motor is running in 70 chevelle...I was considering purchase...any info on block/ head original application?? and how about value?? is there any way to tell if it is definitely a 4 bolt without dropping the pan??

thanks alot guys!!!

[Mr70]

I have come across many 1969-70 L-78 Vehicles with this block as their warranty replacement.
This was the typical replacement block for the 396-402/300Hp-330Hp-350Hp & 375Hp equipped vehicles later on in their life.It replaced their original #854 blocks.
The #290 block was originally released in 1972 & casted as a 2-bolt and 4-bolt.
2-bolt for the 1972 402/240Hp Chevelle-Camaro-Passenger series,but with your #291 heads/pistons it sounds like the solid lifter 4-bolt replacement block to me.
To be sure,just look above the oil filter mounting boss for two enlarged pipe threaded holes,(3/8" & 1/2" respectively),to accept an external oil cooler if so desired.That would call out 4-bolt mains.
The CE date you relayed is a 1973 replacement vintage,the #50491 unit produced from the Tonawanda plant.
Value???..I really don't know what someones willing to pay today..the most being to an owner with a vehicle fitting this description I would imagine.
I think those rods/pistons/heads are the meat of the value.

[iluv69s]

Thanks MR70...I assume the motor would be worth more as a good running sq. port big block chevy than in parts??? I was thinking the heads are worth as much as the rest of the motor...but I thought the 840 heads were used in 69...are these heads too early for 70?? thanks again...

anybody else have an idea value?? thanks....

[Mr70]

I think they made the 840 heads up to May of 69,then the 291's were released.
Your 291 head dates would mesh well on any late assembled 1969 solid lifter engine..COPO's too,and early assembled 1970 L-78 Chevelle/Elco & Nova.

[427king]

Latest 840 is F 2 9 that ive ever seen.

[HiHorse]

[ QUOTE ]
Latest 840 is F 2 9 that ive ever seen.

[/ QUOTE ]
My survivor has 291 heads dated F 4 9 and F 10 9