The torque for your manifold from Motor's Truck Repair Manual, 19th edition. center clamp bolts 25-30 ft-lbs. end clamp bolts 15-25 ft-lbs.

For your heat riser try your local parts source first then if that doesn't work try the vendor listings from the link on the Stovebolt main page.

"It's just a phase. He'll grow out of it." Mama, 1964

1956 Chevy 1/2-ton 3100
1953 Chevy 6100 "The Yard dog"
1954 GMC Suburban Now with a new proud owner.