Build suggestions for 340?

Jim64 said
Two more questions: is there any reason to buy new cylinder head bolts? Mine seem fine; every bolt came out smoothly.

And - is this a decent harmonic balancer? Mine seems fine, but is 50 years old...
Pro Race Products Pro Sport Harmonic Balancer

Jim

It may SEEM fine, but would you trust a 50 year old rubber if you were 18 again? Yeah, me neither.
The harmonic damper I pulled off my 91 360LA , after I bead blasted it just to clean it up convinced me to shitcan it.
If you're constrained by size, the Fluidampr is 1/4" greater diameter. Note it is for an internal balance engine, so you're good there.

I just ordered this for my 360 build with part of my stimulus check.
Fluidampr 720301 Fluidampr Harmonic Dampers | Summit Racing

Fluidampr Harmonic Dampers 720301

Fluidampr Harmonic Dampers

Brand:Fluidampr

Manufacturer's Part Number:720301

Part Type:Harmonic Balancers

Product Line:Fluidampr Harmonic Dampers

Summit Racing Part Number:FLU-720301

UPC:815293001036

Engine Balance:Internal

SFI Rating:SFI 18.1

Degree Markings:Yes

Degree Marking Range:50 BTDC to 10 ATDC

Outside Diameter (in):7.250 in.

Keyway Quantity:One

Harmonic Balancer Material:Steel

Harmonic Balancer Construction:Fluid

Harmonic Balancer Finish:Black zinc chromate

Mounting Hardware Included:No

Quantity:Sold individually.

Notes:Additional timing/degree marks at 90, 180, and 270 degrees. This damper is designed to be used with a 1971 and later timing cover with the pointer on the driver side. If it is used with the passenger side pointer, it will be 90 degrees off