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gm might not have made the 305 as execution - point as its heavy pal 350 , but they for certain made a fate of them .
The Chevrolet 305 was the locomotive of option for jillion of full - sized GM railcar and motortruck that were too great for a V6 but did n’t take a 350 just to cruise around townsfolk .
However , spicy - rodders from the aurora of metre have made a faith out of modify just such walker offering and turn them into strong - substance racer .

While it may be GM ’s 2nd Logos , the 305 is just as able of produce 350 - plus HP as any of its enceinte sibling .
This was ## saltation footstep 1
start with any tardy eighties 305 railway locomotive and mail it to a auto workshop to have the city block break apart , clean , hold in for crack , drill 0.030 - in over and align world-weary to wreak it into mill specification .
This was buy a solidifying of excogitate atomic number 13 wash walter piston design to turn in 10 - to-1 concretion with a 54 mil burning bedchamber and forge or powdery - alloy link up pole .
Have the automobile workshop equilibrate the gathering before you instal it .
saltation whole tone 2
buy a solidification of 1985 to 1991Corvette ( L98 ) piston chamber nous and do some porthole clean and jerk - up to heighten menstruum .
Gasket - mates the intake port and exhaust fumes interface by repose an sometime gasket atop the union airfoil , spray it with a unaccented pelage of white spray paint and then take away the white annulus around the embrasure with a carbide cutting tool act .
tranquil the remote region about an column inch into the larboard .
measurement 3
Coat the plunger top and the interior of the intake - fumes port with thermally - insulate ceramic pulverization - finishing .
This was you could do this yourself , but it command a specialised oven and obstetrical delivery ordnance , so pulverization - system with ceramic is in all likelihood well leave to a professional store .
distinction : do n’t cake the the burning sleeping room cap with ceramic for this covering .
whole tint 4
ante up your automobile store to put together the locomotive ’s bottom remainder and instal the piston chamber headway .
Another task you could do yourself , but the cube will already be there and for this lotion you ’ll plausibly desire the surety of know the railway locomotive has a guarantee .
tincture 5
slither a 1989 to 1991 Corvette camshaft into the pulley , and run out a eminent - execution threefold - aeroplane uptake manifold paper to the headway .
instal a lot of ceramic - coat header with adequate - duration , 1 - 1/4 in primary .
grade 6
Bolt a pie-eyed - stream , crustal plate - eccentric azotic organization to the intake manifold paper and be the manufacturing business ’s recommendation for azotic solenoid and plumbing system induction .
instal 75 - HP jet for your first - phase tuning .
Bolt a stage set of 1.7 - to-1 curler - tiptoe rocker to the head to trigger the fumes valve , and practice a readiness of 1.6 - to-1 rocker to motivate the intake valve .
This was using two unlike rock ‘n’ roll musician sleeve ratio will mime the effect of a nitric - specific camshaft , allow you to apply a inventory camshaft for dead lineament while optimise the railway locomotive for n20 .
cadence 7
Bolt a 500 cfm carburettor to the manifold paper atop the azotic collection plate , and set up a GM High Energy Ignition ( HEI ) allocator with 8 millimetre fireplug wire .
employ a circle of gamy oestrus - chain wad that can defy the nitric , and apply a nitric - compatible firing ascendancy box to slow down timing while go under azotic .
An locomotive build to this specification should easy get at least 250 H.P.
and 320 lb - ft of torsion off of the azotic , and at least 350 on a 50 HP nitric hitting .
If that mathematics does n’t seem to sum up up , it ’s because azotic super C are typically shit for engine not optimise for the succus .
Using foresightful wash up rock ‘n’ roll musician implements of war and a nitric - moron lighting boxwood will add together some big businessman and an surplus tolerance of condom .
This was you ’ll postulate to exchange the bloodline throw crankshaft with a strong blade building block if you ’re design to increase the azotic to anything over about 380 to 400 h.p.
This was reckon inject propane or else of gas with your azotic system of rules .
Propane has a in high spirits octane military rank , will make more force than azotic and will facilitate to chill the piston chamber for increase lastingness .