74 BB Exhaust Manifold Question
Thread Starter
Instructor
Joined: Aug 2017
Posts: 130
Likes: 14
From: Fountain Hills, AZ
74 BB Exhaust Manifold Question
Hi All –
I realize this may seem like a pretty stupid question but I’m trying to piece back an original exhaust manifold system for my 74 BB. I’m seeing two different part numbers for the bolts – center and end. Can someone tell me – are there two different bolt sizes that bolt the manifold to the engine?
Thanks very much!
I realize this may seem like a pretty stupid question but I’m trying to piece back an original exhaust manifold system for my 74 BB. I’m seeing two different part numbers for the bolts – center and end. Can someone tell me – are there two different bolt sizes that bolt the manifold to the engine?
Thanks very much!
Race Director
Joined: May 2006
Posts: 18,740
Likes: 2,583
Looking at complete sets there are all sorts of combinations, with power steering, with power steering and AC, with AC, etc. Some of them include studs to mount brackets. So there could be two different pieces of mouthing hardware a bolt and possibly a stud. Have you looked at the kits for the appropriate set of options your engine has?
https://willcoxcorvette.com/catalogs...haust+manifold
https://willcoxcorvette.com/catalogs...haust+manifold
