Quote:
Originally Posted by WildBillyT
(Post 365366)
Last year. There were five of them up for sale on ebay for $2500 each (in crates). What I was told is that a significant amount of Mark IV and Mark V stuff is not compatible (rotating assemblies, camshafts, etc) so even though there are some parts you can use it will be tough to put together a good combination.
|
look around again. if you can get good heads already worked to 325cc intake for 1200, and the whole kit and kaboodle for $6500, including the long block, i'd say start looking under the seat cushions for spare change. it can be done, just written about in one of the rags (chevy hi perf. july 2007). the cover says "small block versus big block, $6500 pump gas shootout, 422CI versus 505CI". they got to the 505.3 inches by boring .100 over a 454 and adding .25" stroke. Aerohead Racing supplied the heads for $1115, with 325cc intake ports (sorry, i knew it was somewhere around that).
parts list:
isky solid flat tappet cam, with 1.75:1 rockers lift is 0.638/0.654 with 259/268 degrees duration with lsa 106 degrees
ARP accessory bolt kit, balancer bolt and head bolts
Aerohead Racing new GM 14097088 cast iron heads 118cc combustion chamber, 325cc rectangular intake ports, stainless, swirl-polished valves 2.19/1.88, hardened seats, 3 angle valve job, 7/16th-inch studs with Manley guideplats and upgraded springs
Edelbrock 2902 Victor Jr 454-R intake
Fel-Pro gaskets
Isky lifters and pushrods
labor
total: $6360
now, this was just on the dyno, not in a real car, but they said they paid attention to the fact that they'd like to put it in a car, so it's not a dyno queen (like the small block in the same article). it maxed out at 594 lb ft and 622 hp with a compression ratio of 10.5:1 on 91 octane regular unleaded.
pretty sweet.
as far as incompatibility between the two motors, it's in the heads and it's a water jacket that needs to be shrouded by the deck and a specially made gasket.
no longer just the stuff of dreams. all it takes is a little patience for the aftermarket to pick up on the potential...