If I can figure out what you are talking about(picture would help) those devices are located in two places, depending on which manifolds they secure, no chance to get the wrong fit. Make sure to use brass nuts, easily secured at Mc Master-Carr, etc. if you ever want to take it apart again.
Also do not tighten the inter manifold bolts until both manifolds are secured to the head first,
Ed
'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires. '47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle. '54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed. '55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.
