Oh and for the record, for many years I actually owned one of those "Mystery Motor" aluminum intakes. I sold it to my Nebraska friend many years ago on the condition he not resell it for a profit. I guess I should bring home some photographic evidence of that next time I visit him.
As soon as I arrive at his place, I go straight to where the intake is to make sure it's still there and that he hasn't sold it! It's a standing joke he and I have that he has actually has sold it and always gets it back when he knows I'm coming to visit. I keep threatening to pull a surprise visit one day!
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1966 Strato Chief 2 door, 427 4 speed, 45,000 original miles
1966 Grande Parisienne, 396 1 of 23 factory air cars
Those are cool keepers for the garage wall for sure. Likely off an early 70's GMC medium duty truck seeing as there were no 427's in the light duties. I have seen invader 350's I am sure though on the light duty models.
Your valve covers came off a 71-72 GMC Sprint SP ( El Camino Body) with a 427 Invader. GM also put a invader 350 in them too. They only made the 427 for the two years. The motors are pretty rare. Horse power under rated due to 70's gas wars. There is one web site that has alot of information about the car. Just put in GMC Sprint.
Your valve covers came off a 71-72 GMC Sprint SP ( El Camino Body) with a 427 Invader. GM also put a invader 350 in them too. They only made the 427 for the two years. The motors are pretty rare. Horse power under rated due to 70's gas wars. There is one web site that has alot of information about the car. Just put in GMC Sprint.
Sprints had exactly the same drive train options in 71-72 as El Caminos, and that meant 6 bangers, 350s or 454s; no 427s were available in passenger cars in those years. Those valve covers are off of a medium or heavy duty GMC truck.
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Hillar
1970 LS4 (eventually an LS5) Laurentian 2dr hdtp -and a bunch of other muscle cars...
I'm with Hillar on this one. The Sprint V8s were called "Invader 307", "Invader 350", "Invader 400", and "Invader 454". The "400" was actually the 402 BBC.
