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89BigBlock
04-04-2011, 01:54 PM
Im thinking of downsizing to a 350 from my 454. Has anyone done this swap before?

tph
04-04-2011, 02:28 PM
Im thinking of downsizing to a 350 from my 454. Has anyone done this swap before?

I think the big block MC's are rare. You might be better off selling and finding a nice clean small block MC.

CantRepeat
04-04-2011, 02:31 PM
I think the big block MC's are rare. You might be better off selling and finding a nice clean small block MC.

I agree. Some folks might just pay premium for the big block.

rjracin240
04-05-2011, 12:06 PM
I think the big block MC's are rare. You might be better off selling and finding a nice clean small block MC.

Exactly why reinvent the wheel at great expense!!! just my .02c

thatsmrmastercraft
04-05-2011, 01:32 PM
At the cost and time involved in the swap, it would be a long time before you would see any real savings.

89BigBlock
04-09-2011, 11:46 AM
Thanks for the input. I should have said I was curious to know what is involved in a swap, labor and expense wise. The reasoning behind is mostly for fuel savings. When I start looking into heads, manifolds, intake, etc, the cost of a crate motor seems a little more appealing.

matt
04-09-2011, 03:06 PM
Should be a easy swap, but why? In a car they will interchange if it works for the mounts and all.

DooSPX
04-09-2011, 07:01 PM
I really think you should sell your BBC and spend that money on a SBC boat. You will kill your resell going from a 454 to a 350.

1redTA
04-10-2011, 04:43 PM
wanna swap to a 351w powerslot? Just throwing it out there :-)

DooSPX
04-10-2011, 07:27 PM
BTW, I do not see you getting a great deal of fuel savings going from a carb BBC to a carb SBC. I cant see you justifying the cost with just fuel savings.

TRBenj
04-11-2011, 09:19 AM
I would not expect to see much of a change in fuel economy either. I have both big blocks and small blocks, and when propped correctly (the big block spins a much steeper wheel) they all consume fuel at a comparable rate.

Im not sure how MC fastened the engines to the stringers, but the mounts on big blocks and small blocks would not line up.

89BigBlock
04-12-2011, 09:05 AM
I really think you should sell your BBC and spend that money on a SBC boat. You will kill your resell going from a 454 to a 350.

If anything I'd keep the BB just for that reason. A BB chillin in the garage would just look cool. :cool:

I would not expect to see much of a change in fuel economy either. I have both big blocks and small blocks, and when propped correctly (the big block spins a much steeper wheel) they all consume fuel at a comparable rate.

Im not sure how MC fastened the engines to the stringers, but the mounts on big blocks and small blocks would not line up.

I think your right about the props and prolly the most cost effective part to try first.

I didn't expect them to. From what I remember, theres a steel plate that runs along both sides of the bilge and a Crow's foot type of mount to the block.