convert 4.8 to 5.3

[gm327]

I have a 4.8 shortblock gen IV

I've seen the 5.3 and if im not mistaken they share the same bore - the difference is the stroke.

in order 2 convert it to 5.3 would i only need to change 2 shorter rod and longer crank.?

[zebra]

i know the gen3 5.3 motors also had dished pistons, except the VHOs - they had the same flat-tops as the 4.8

[gm327]

gen IV 4.8's/5.3 share the same flat top pistons..

[Frenchy]

why not just get a 6.0

[cjcalhoun]

all u need is the 5.3 crank with the right reluctor wheel for your aplication and the 5.3 rods

[George C]

i know the gen3 5.3 motors also had dished pistons, except the VHOs - they had the same flat-tops as the 4.8

where did you get that info at? you might want to look into that a little more





to the OP your better off just finding another motor instead of going thru that hassle

[Frenchy]

Little mixed up, the HO 5.3's had the flat tops and were aluminium. The VHO's are the same a 2wd SS

[zebra]

where did you get that info at? you might want to look into that a little...

Little mixed up, the HO 5.3's had the flat tops and were aluminium. The VHO's are the same a 2wd SS

my bad... i was talking about the aluminum 5.3 with the 243 or 799 heads - whichever truck that came in

[molitor]

to answer the question, yes a crank and rods would bring you to a 5.3L displacement, but if you bored the 4.8L out to 3.905'' and kep the stroke, you could build a high revving 327, which would be great with heads and a cam that had a high rpm range powerband