Bore 5 3 To 5 7. Bore Dimensions Your 5.3 more than likely will not have sleeves, since it is an iron block 5.3L pistons are somewhat dished from the factory so a flat top piston from an LS1/6 may put your static compression ratio above 11:1.
What Does A Bore Gauge Measure at Julio Hohn blog from storage.googleapis.com
You'd have to know your head chamber size (61.15cc I believe for 5.3 heads), head gasket thickness and bore, 99mm block bore size with a 92mm stroke, and most importantly piston type Then buy 5.7 pistons and use the 5.3 rotating assembly in the new block
What Does A Bore Gauge Measure at Julio Hohn blog
If you have a 10 to 1 CR it will make it close to 11 to 1 CR. It cost me $125 to bore my 5.3 to a 5.7 99' Silverado RCSB Z71: 5.7L Iron LS1, 11.2:1, Custom EPS Cam, Ported 862's,Ported TB, E-Bay Cold Air, E-Bay Long Tubes, Dynomax X-Pipe Exhaust, Electric Fans, Innovative LC-1, Self Built 4L60E, Circle D Pro Single Disc, 4:10 ValueTrac 3.905" bore 3.622" stroke 6.125" rod-8.6cc dish top 9.3 w/ 66cc head 9.7 w/ 62cc head 9.0 w/ 70cc head 1.314 compression ht..927 pin 1.5mm 1.5mm 3mm ring grooves Diamond LS1 Street/Strip - Dish Pistons
Browning 1235621.0 Steel Sleeve Coupling, 1.75" Bore, 53/8" OD Industrial & Scientific. -the 5.3 and 5.7 have the same stroke and IN FACT most is not all of the 5.3 cranks have the 12552216 casting number which is the same crank as the 5.7 but WITHOUT the lightening holes which run through the. 5.3L pistons are somewhat dished from the factory so a flat top piston from an LS1/6 may put your static compression ratio above 11:1.
Little Iron Orphan A Budget IronBlock 5.7L LS From A Scrapped 5.3L. You'd have to know your head chamber size (61.15cc I believe for 5.3 heads), head gasket thickness and bore, 99mm block bore size with a 92mm stroke, and most importantly piston type If you can have the block sonic tested and checked for cracks first, you are going to be much more likely to succeed without issue.