‘83 K5/NP208: Headers vs exh. manifold compatibility/fitment/performance /recommendations with new crate SBC SP350/385HP/400TQ

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BlazerBill

Full Access Member
Joined
Mar 24, 2023
Posts
74
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62
Location
Texas
First Name
Billy
Truck Year
1983
Truck Model
Chevy K5 Blazer
Engine Size
350
I will be installing a new GM crate SP350/385HP/400TQ engine into my ‘83 K5 Blazer with a 4” lift, 700R4 and an NP208 transfer case. I will be using the Blazer for street, highway and off-roading but not rock crawling. The SP350 engine has aluminum heads, “D” shaped exhaust ports with angled spark plugs. I would appreciate recommendations for headers versus exhaust manifolds that are fitment compatible with the SP350/D shaped exhaust ports with angled plug cylinder heads/700R4/NP208 TC for highway cruising to get to off-road areas. Anybody else have this same combination? Thanks
 

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