80 grand prix sj vortec swap

Grand prix 80

Grand prix 80

Not-quite-so-new-guy
Aug 9, 2018
20
10
3
#31
Nice build so far! I'm doing something similar in an 84 monte carlo ss, did you have any issues with the power steering pump to the power steering gear box? Maybe it's the mounts I used. What mounts did you end up using?

Can't wait to see progress!
Nope I used the stock 98 GNC serpentine setup and mounts and the 98 gmc hoses went right in no problem into stock steering box
 
Grand prix 80

Grand prix 80

Not-quite-so-new-guy
Aug 9, 2018
20
10
3
#32
Nope I used the stock 98 GNC serpentine setup and mounts and the 98 gmc hoses went right in no problem into stock steering box
No I used gmc power steering pump I used the entire engine and serpentine set up out of the 98 gmc all fit just fine
 
Kratos

Kratos

Apprentice
Nov 7, 2017
61
81
18
Central Pa
#33
No I used gmc power steering pump I used the entire engine and serpentine set up out of the 98 gmc all fit just fine
I run a similar serpentine setup on my 83 El Camino. I like that you have the Vortec heads! that thing ought to run like a scalded cat!
 
Grand prix 80

Grand prix 80

Not-quite-so-new-guy
Aug 9, 2018
20
10
3
#34
I run a similar serpentine setup on my 83 El Camino. I like that you have the Vortec heads! that thing ought to run like a scalded cat!
I sure am hoping so. I had the option of 3 different vortex 5.7 engines and the 98 GNC had the most hp stock 255 so I'm hoping with converting it over and dropping half the weight of a gmc yukon it should run just like that. I'm running into some issues though so trying to figure it out isnt the easiest. Never done this extent of a swap. But will be worth it
 
Kratos

Kratos

Apprentice
Nov 7, 2017
61
81
18
Central Pa
#35
I sure am hoping so. I had the option of 3 different vortex 5.7 engines and the 98 GNC had the most hp stock 255 so I'm hoping with converting it over and dropping half the weight of a gmc yukon it should run just like that. I'm running into some issues though so trying to figure it out isnt the easiest. Never done this extent of a swap. But will be worth it
I am also running a 70's era 350 with Vortec heads in my 65 El Camino. the engine( block and heads) should fit into the car , no problem. as for running an aftermarket intake on Vortec heads, everyone I talked to recommended the perma seal intake gaskets.FEL-PRO Part # MS98000T PermaDryPlus®
as for the Alternator and harness because of the Serpentine belt set up. the adapter harness is all I have ever needed to run the late model alternator ( I have ran this on my 83 and 84 El Caminos, wiring it to work in the 65 is a whole different task)
 

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