350 / 425 carb

1972madison · 07-28-2007, 11:35 AM

i have a 1972 350 rocket in my cutlass with a 4 barrel holley carb and im wondering if that carb will fit on a 425 super rocket, cuz im switching the engines.

442Harv · 07-30-2007, 06:51 AM

If the intakes are both spread bore, and carb is, it will work. I just changed my 72 350 to 455, but I have the Qjet, and I checked my book and jets and rods are all the same. I checked the older 425 ones like 66-67 to a 330 of those years, and they use the same jets size, but the rods are one size different, very little difference. You can rejet it if you need to? Probably will work OK as is.

1972madison · 07-30-2007, 12:25 PM

k thanks

07-28-2007, 11:35 AM	#1 (permalink)
1972madison Member Join Date: Jun 2007 Posts: 38	350 / 425 carb i have a 1972 350 rocket in my cutlass with a 4 barrel holley carb and im wondering if that carb will fit on a 425 super rocket, cuz im switching the engines. __________________ -1972 442 with a 425 super rocket-

07-30-2007, 12:25 PM	#3 (permalink)
1972madison Member Join Date: Jun 2007 Posts: 38	k thanks __________________ -1972 442 with a 425 super rocket-

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07-30-2007, 06:51 AM	#2 (permalink)
442Harv Member Join Date: Mar 2007 Posts: 62	If the intakes are both spread bore, and carb is, it will work. I just changed my 72 350 to 455, but I have the Qjet, and I checked my book and jets and rods are all the same. I checked the older 425 ones like 66-67 to a 330 of those years, and they use the same jets size, but the rods are one size different, very little difference. You can rejet it if you need to? Probably will work OK as is.