350 to 454 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

griesel72 · 11-25-2003, 01:03 PM

I'm tring to decide how hard it is to swap a 454 into a 71 3/4 ton that used to have a 350. It is a 4X4 and has a 4 speed. Do i have to do anything to the frame (cutting, grinding etc) I've heard that some guys have trouble with the valve covers hitting the ac components on the firewall? Do i use the stock 350 motor mount towers? Do i have to dent the firewall to get the dist to fit?

Sorry for all the questions, just tring to decide if all the work will be worth it.

Thanks
David

11-25-2003, 01:03 PM	#1
griesel72 Senior Member Join Date: Apr 2003 Location: Howard, Kansas USA Posts: 1,997	350 to 454 I'm tring to decide how hard it is to swap a 454 into a 71 3/4 ton that used to have a 350. It is a 4X4 and has a 4 speed. Do i have to do anything to the frame (cutting, grinding etc) I've heard that some guys have trouble with the valve covers hitting the ac components on the firewall? Do i use the stock 350 motor mount towers? Do i have to dent the firewall to get the dist to fit? Sorry for all the questions, just tring to decide if all the work will be worth it. Thanks David __________________ 1969 K10 Custom 10 1997 Z71 2006 Volkswagen Jetta TDI 2006 King Ranch 1980 Wife



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