Heat plate will help. My 2 cents: I was running Fenton cast headers with pipes and plate on stock intake. Back to stock exhaust manifold, can't tell any difference in power but has better cold drivability.
BC 1960 Chevy C10 driver 261 T5 4.10 dana 44 power loc 1949 GMC 250 project in waiting 1960 C60 pasture art Retired GM dealer tech. 1980 - 2022
