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well considering mine is starting to develop large cracks that are slowly forming into holes, i would say it would give me a new manifold with better intake performance
The things to look for are. Is the car carburetor or TBI I believe you are carb. EGR or no EGR make sure the intake will fit under the hood and hood
will close. check that the coolant return will be in same location as old one.you may also want to stay with the same style bore flange. use anti seize
on the stud bolts for the carb. good luck C8-)you may need to know the cfm of the carbThe Edelbrock accepts both the square bore and the Q-jet (spread bore) carbs. It’s a “universal” manifold with both bolt patterns, but you need an adaptor to run a square bore carb on the Edelbrock (about $8).
The Edelbrock manifolds are dual plane designs unlike V8 manifolds from the 1950s and early 60s. Dual plane manifolds have advantages over the older ones, but some of the stock GM dual planes are just as performance oriented as the Edelbrock. An Edelbrock manifold would have little and perhaps no performance advantage over your stock manifold. They are lighter than iron manifolds and they do accept both carb types and they are engineered to provide gains in conjunction with other modifications, but that would entail an overhaul of the engine, increased compression, balancing, head work and a high perf camshaft and valve train.
If you want one you can contact Edelbrock and ask them which of their manifolds work best on your engine or you could find the retailer with the best price (Jeg’s, Summit, P.A.W. ?) and call them with the same question. I’m almost certain their Oldsmobile manifold fits your engine and you can hook up everything in 49 states or Calif.
I’ve read about your recent experiences with repairs and I think you would find rebuilding your Q-jet easier than some of the jobs you have done already. The first time I was faced with your decision with a worn Q-jet, I was talked into going the Edelbrock Performer/ Holley 4 barrel route. I would never do that again or recommend it to anyone with basic automotive skills.You could check your manifold for vacuum leaks. Water works well on a v8 intake manifold.
If you’re doing the manifold, it’s a good time to replace old hydraulic lifters before they start clicking.A couple of experiences I’ve had:
First, with a 78 Thunderbird 351M 2bbl. I put on an Edelbrock 4bbl manifold so I could install a Holley 4bbl. I spent lots of money to gain nothing.
On a 1983 Grand Prix with the 5.0 Chevy V8 I installed Heddman Hedders and a dual exhaust. I swapped out the electronically controlled Qjet for an older Qjet and also swapped the computer controlled HEI distributer for an older vacuum controlled HEI distributer. Once I found the right timing for this setup, the car was completely different. This car was a bit of a slug before the work. But, it really moved afterwards.
If your manifold is cracking, you’re probably having problems already. A vacuum leak causes lots of problems. If you’re just wanting to replace it, it’s your money, but you won’t gain anything from it.
A couple of experiences I’ve had:
First, with a 78 Thunderbird 351M 2bbl. I put on an Edelbrock 4bbl manifold so I could install a Holley 4bbl. I spent lots of money to gain nothing.
On a 1983 Grand Prix with the 5.0 Chevy V8 I installed Heddman Hedders and a dual exhaust. I swapped out the electronically controlled Qjet for an older Qjet and also swapped the computer controlled HEI distributer for an older vacuum controlled HEI distributer. Once I found the right timing for this setup, the car was completely different. This car was a bit of a slug before the work. But, it really moved afterwards.
If your manifold is cracking, you’re probably having problems already. A vacuum leak causes lots of problems. If you’re just wanting to replace it, it’s your money, but you won’t gain anything from it.
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